| # | Flowering plants | Flowering plants | | | | | |
|
|---|
| 1 | #Abronia macrocarpa^ | Large-fruited sand-verbena | U.S.A. (TX) | Nyctaginaceae | E | 331 | NA | NA |
| 2 | #Abutilon eremitopetalum^ | None | U.S.A. (HI) | Malvaceae | E | 435 | NA | NA |
| 3 | #Abutilon menziesii^ | Ko`oloa`ula | U.S.A. (HI) | Malvaceae | E | 243 | NA | NA |
| 4 | #Abutilon sandwicense^ | None | U.S.A. (HI) | Malvaceae | E | 448 | NA | NA |
| 5 | #Acaena exigua^ | Liliwai | U.S.A. (HI) | Rosaceae | E | 467 | NA | NA |
| 6 | #Acanthomintha obovata^ ssp. #duttonii^ | San Mateo thornmint | U.S.A. (CA) | Lamiaceae | E | 204 | NA | NA |
| 7 | #Achyranthes splendens^ var. #rotundata^ | Round-leaved chaff-flower | U.S.A. (HI) | Amaranthaceae | E | 220 | NA | NA |
| 8 | #Aconitum noveboracense^ | Northern wild monkshood | U.S.A. (IA, NY, OH, WI) | Ranunculaceae | T | 39 | NA | NA |
| 9 | #Aeschynomene virginica^ | Sensitive joint-vetch | U.S.A. (DE, MD, NC, NJ, PA, VA) | Fabaceae | T | 470 | NA | NA |
| 10 | #Agalinis acuta^ | Sandplain gerardia | U.S.A. (CT, MA, MD, NY, RI) | Scrophulariaceae | E | 325 | NA | NA |
| 11 | #Agave arizonica^ | Arizona agave | U.S.A. (AZ) | Agavaceae | E | 147 | NA | NA |
| 12 | #Alectryon macrococcus^ | Mahoe | U.S.A. (HI) | Sapindaceae | E | 467 | NA | NA |
| 13 | #Alsinidendron obovatum^ | None | U.S.A. (HI) | Caryophyllaceae | E | 448 | NA | NA |
| 14 | #Alsinidendron trinerve^ | None | U.S.A. (HI) | Caryophyllaceae | E | 448 | NA | NA |
| 15 | #Amaranthus pumilus^ | Seabeach amaranth | U.S.A. (DE, MA, MD, NC, NJ, NY, RI, SC, VA) | Amaranthaceae | T | 498 | NA | NA |
| 16 | #Ambrosia cheiranthifolia^ | South Texas ambrosia | U.S.A. (TX) | Asteraceae | E | 547 | NA | NA |
| 17 | #Amorpha crenulata^ | Crenulate lead-plant | U.S.A. (FL) | Fabaceae | E | 192 | NA | NA |
| 18 | #Amphianthus pusillus^ | Little amphianthus | U.S.A. (AL, GA, SC) | Scrophulariaceae | T | 302 | NA | NA |
| 19 | #Amsinckia grandiflora^ | Large-flowered fiddleneck | U.S.A. (CA) | Boraginaceae | E | 179 | 17.96(a) | NA |
| 20 | #Amsonia kearneyana^ | Kearney's blue-star | U.S.A. (AZ) | Apocynaceae | E | 343 | NA | NA |
| 21 | #Ancistrocactus tobuschii (=Echinocactus t., Mammillaria t.)^ | Tobusch fishhook cactus | U.S.A. (TX) | Cactaceae | E | 80 | NA | NA |
| 22 | #Apios priceana^ | Price's potato-bean | U.S.A. (AL, IL, KY, MS, TN) | Fabaceae | T | 373 | NA | NA |
| 23 | #Arabis mcdonaldiana^ | McDonald's rock-cress | U.S.A. (CA) | Brassicaceae | E | 44 | NA | NA |
| 24 | #Arabis perstellata^ | Rock-cress | U.S.A. (AL,KY,TN) | Brassicaceae | E | 570 | NA | NA |
| 25 | #Arabis serotina^ | Shale barren rock-cress | U.S.A. (VA, WV) | Brassicaceae | E | 352 | NA | NA |
| 26 | #Arctomecon humilis^ | Dwarf bear-poppy | U.S.A. (UT) | Papaveraceae | E | 78 | NA | NA |
| 27 | #Arctostaphylos hookeri^ var. #ravenii (=A. pungens^ ssp. #r.)^ | Presidio (=Raven's) manzanita | U.S.A. (CA) | Ericaceae | E | 65 | NA | NA |
| 28 | #Arctostaphylos morroensis^ | Manzanita, Morro | U.S.A. (CA) | Ericaceae | T | 567 | NA | NA |
| 29 | #Arenaria cumberlandensis^ | Cumberland sandwort | U.S.A. (KY, TN) | Caryophyllaceae | E | 311 | NA | NA |
| 30 | #Arenaria paludicola^ | Marsh sandwort | U.S.A. (CA) | Caryophyllaceae | E | 511 | NA | NA |
| 31 | #Argemone pleiacantha^ ssp. #pinnatisecta^ | Sacramento prickly-poppy | U.S.A. (NM) | Papaveraceae | E | 360 | NA | NA |
| 32 | #Argyroxiphium kauense^ | Ka`u silversword | U.S.A. (HI) | Asteraceae | E | 497 | NA | NA |
| 33 | #Argyroxiphium sandwicense^ ssp. #macrocephalum^ | `Ahinahina (=Haleakala silversword). | U.S.A. (HI) | Asteraceae | E | 467 | NA | NA |
| 34 | #Argyroxiphium sandwicense^ ssp. #sandwicense^ | `Ahinahina (=Mauna Kea silversword) | U.S.A. (HI) | Asteraceae | E | 219 | NA | NA |
| 35 | #Aristida chaseae^ | None | U.S.A. (PR) | Poaceae | E | 501 | NA | NA |
| 36 | #Aristida portoricensis^ | Pelos del diablo | U.S.A. (PR) | Poaceae | E | 398 | NA | NA |
| 37 | #Asclepias meadii^ | Mead's milkweed | U.S.A. (IA, IL, IN, KS, MO, WI) | Asclepiadaceae | T | 321 | NA | NA |
| 38 | #Asclepias welshii^ | Welsh's milkweed | U.S.A. (AZ, UT) | Asclepiadaceae | T | 295 | 17.96(a) | NA |
| 39 | #Asimina tetramera^ | Four-petal pawpaw | U.S.A. (FL) | Annonaceae | E | 244 | NA | NA |
| 40 | #Astragalus albens^ | Cushenbury milk-vetch | U.S.A. (CA) | Fabaceae | E | 548 | NA | NA |
| 41 | #Astragalus applegatei^ | Applegate's milk-vetch | U.S.A. (OR) | Fabaceae | E | 510 | NA | NA |
| 42 | #Astragalus bibullatus^ | Pyne's (=Guthrie's) ground-plum | U.S.A. (TN) | Fabaceae | E | 437 | NA | NA |
| 43 | #Astragalus cremnophylax^ var. #cremnophylax^ | Sentry milk-vetch | U.S.A. (AZ) | Fabaceae | E | 409 | NA | NA |
| 44 | #Astragalus humillimus^ | Mancos milk-vetch | U.S.A. (CO, NM) | Fabaceae | E | 187 | NA | NA |
| 45 | #Astragalus montii (=A. limnocharis^ var. #m.^) | Heliotrope milk-vetch | U.S.A. (UT) | Fabaceae | T | 298 | 17.96(a) | NA |
| 46 | #Astragalus osterhoutii^ | Osterhout milk-vetch | U.S.A. (CO) | Fabaceae | E | 353 | NA | NA |
| 47 | #Astragalus phoenix^ | Ash Meadows milk-vetch | U.S.A. (NV) | Fabaceae | T | 181 | 17.96(a) | NA |
| 48 | #Astragalus robbinsii^ var. #jesupi^ | Jesup's milk-vetch | U.S.A. (NH, VT) | Fabaceae | E | 271 | NA | NA |
| 49 | #Astrophytum asterias (=Echinocactus a.)^ | Star cactus | U.S.A. (TX), Mexico | Cactaceae | E | 521 | NA | NA |
| 50 | #Auerodendron pauciflorum^ | None | U.S.A. (PR) | Rhamnaceae | E | 531 | NA | NA |
| 51 | #Ayenia limitaris^ | Texas ayenia | U.S.A. (TX), Mexico | Sterculiaceae | E | 547 | NA | NA |
| 52 | #Banara vanderbiltii^ | Palo de Ramón | U.S.A. (PR) | Flacourtiaceae | E | 255 | NA | NA |
| 53 | #Baptisia arachnifera^ | Hairy rattleweed | U.S.A. (GA) | Fabaceae | E | 39 | NA | NA |
| 54 | #Berberis sonnei (=Mahonia s.)^ | Truckee barberry | U.S.A. (CA) | Berberidaceae | E | 76 | NA | NA |
| 55 | #Betula uber^ | Virginia round-leaf birch | U.S.A. (VA) | Betulaceae | E | 39 | NA | NA |
| 56 | #Bidens cuneata^ | Cuneate bidens | U.S.A. (HI) | Asteraceae | E | 141 | NA | NA |
| 57 | #Bidens micrantha^ ssp. #kalealaha^ | Ko`oko`olau | U.S.A. (HI) | Asteraceae | E | 467 | NA | NA |
| 58 | #Bidens wiebkei^ | Ko`oko`olau | U.S.A. (HI) | Asteraceae | E | 480 | NA | NA |
| 59 | #Blennosperma bakeri^ | Sonoma sunshine (=Baker's stickyseed) | U.S.A. (CA) | Asteraceae | E | 453 | NA | NA |
| 60 | #Boltonia decurrens^ | Decurrent false aster | U.S.A. (IL, MO) | Asteraceae | T | 341 | NA | NA |
| 61 | #Bonamia grandiflora^ | Florida bonamia | U.S.A. (FL) | Convolvulaceae | T | 297 | NA | NA |
| 62 | #Bonamia menziesii^ | None | U.S.A. (HI) | Convolvulaceae | E | 559 | NA | NA |
| 63 | #Brighamia insignis^ | `Olulu | U.S.A. (HI) | Campanulaceae | E | 530 | NA | NA |
| 64 | #Brighamia rockii^ | Pua `ala | U.S.A. (HI) | Campanulaceae | E | 480 | NA | NA |
| 65 | #Buxus vahlii^ | Vahl's boxwood | U.S.A. (PR) | Buxaceae | E | 197 | NA | NA |
| 66 | #Caesalpinia kavaiensis (=Mezoneuron k.)^ | Uhiuhi | U.S.A. (HI) | Fabaceae | E | 238 | NA | NA |
| 67 | #Callicarpa ampla^ | Capá rosa (=péndula cimarrona) | U.S.A. (PR) | Verbenaceae | E | 461 | NA | NA |
| 68 | #Callirhoe scabriuscula^ | Texas poppy-mallow | U.S.A. (TX) | Malvaceae | E | 109, 112 | NA | NA |
| 69 | #Calyptronoma rivalis^ | Palma de manaca or manac palm | U.S.A. (PR) | Arecaceae | T | 375 | NA | NA |
| 70 | #Calyptranthes thomasiana^ | None | U.S.A. (PR, VI) British VI | Myrtaceae | E | 529 | NA | NA |
| 71 | #Camissonia benitensis^ | San Benito evening-primrose | U.S.A. (CA) | Onagraceae | T | 172 | NA | NA |
| 72 | #Campanula robinsiae^ | Brooksville (=Robins') bellflower | U.S.A. (FL) | Campanulaceae | E | 356 | NA | NA |
| 73 | #Canavalia molokaiensis^ | `Awikiwiki | U.S.A. (HI) | Fabaceae | E | 480 | NA | NA |
| 74 | #Cardamine micranthera^ | Small-anthered bittercress | U.S.A. (NC) | Brassicaceae | E | 363 | NA | NA |
| 75 | #Carex specuicola^ | Navajo sedge | U.S.A. (AZ) | Cyperaceae | T | 178 | 17.96(a) | NA |
| 76 | #Castilleja grisea^ | San Clemente Island Indian paintbrush | U.S.A. (CA) | Scrophulariaceae | E | 26 | NA | NA |
| 77 | #Caulanthus californicus^ | California jewelflower | U.S.A. (CA) | Brassicaceae | E | 395 | NA | NA |
| 78 | #Centaurium namophilum^ | Spring-loving centaury | U.S.A. (CA, NV) | Gentianaceae | T | 181 | 17.96(a) | NA |
| 79 | #Centaurium sebaeoides^ | `Awiwi | U.S.A. (HI) | Gentianaceae | E | 448 | NA | NA |
| 80 | #Cereus eriophorus^ var. #fragrans^ | Fragrant prickly-apple | U.S.A. (FL) | Cactaceae | E | 208 | NA | NA |
| 81 | #Chamaecrista glandulosa^ var. #mirabilis (=Cassia mirabilis)^ | None | U.S.A. (PR) | Fabaceae | E | 379 | NA | NA |
| 82 | #Chamaesyce celastroides^ var. #kaenana^ | `Akoko | U.S.A. (HI) | Euphorbiaceae | E | 448 | NA | NA |
| 83 | #Chamaesyce deltoidea^ ssp. #deltoidea (=Euphorbia d.^ ssp. #d.^) | Deltoid spurge | U.S.A. (FL) | Euphorbiaceae | E | 192 | NA | NA |
| 84 | #Chamaesyce deppeana(=Euphorbia d.)^ | `Akoko | U.S.A. (HI) | Euphorbiaceae | E | 536 | NA | NA |
| 85 | #Chamaesyce garberi (=Euphorbia g.)^ | Garber's spurge | U.S.A. (FL) | Euphorbiaceae | T | 192 | NA | NA |
| 86 | #Chamaesyce halemanui^ | None | U.S.A. (HI) | Euphorbiaceae | E | 464 | NA | NA |
| 87 | #Chamaesyce kuwaleana^ | `Akoko | U.S.A. (HI) | Euphorbiaceae | E | 448 | NA | NA |
| 88 | #Chamaesyce skottsbergii^ var. #kalaeloana (=Euphorbia s.^ var. #k.^) | `Ewa Plains `akoko | U.S.A. (HI) | Euphorbiaceae | E | 120 | NA | NA |
| 89 | #Chionanthus pygmaeus^ | Pygmy fringe-tree | U.S.A. (FL) | Oleaceae | E | 256 | NA | NA |
| 90 | #Chorizanthe howellii^ | Howell's spineflower | U.S.A. (CA) | Polygonaceae | E | 472 | NA | NA |
| 91 | #Chorizanthe pungens^ var. #hartwegiana^ | Spineflower, Ben Lomond | U.S.A. (CA) | Polygonaceae | E | 528 | NA | NA |
| 92 | #Chorizanthe pungens^ var. #pungens^ | Spineflower, Monterey | U.S.A. (CA) | Polygonaceae | T | 528 | NA | NA |
| 93 | #Chorizanthe robusta^ (incl. vars. #robusta & hartwegii^) | Spineflower, Robust (incl. Scotts Valley) | U.S.A. (CA) | Polygonaceae | E | 528 | NA | NA |
| 94 | #Chorizanthe valida^ | Sonoma spineflower | U.S.A. (CA) | Polygonaceae | E | 472 | NA | NA |
| 95 | #Chrysopsis floridana (=Heterotheca f.)^ | Florida golden aster | U.S.A. (FL) | Asteraceae | E | 232 | NA | NA |
| 96 | #Cirsium fontinale var. obispoense^ | Thistle, Chorro Creek bog | U.S.A. (CA) | Asteraceae | E | 567 | NA | NA |
| 97 | #Cirsium pitcheri^ | Pitcher's thistle | U.S.A. (IL, IN, MI, WI), Canada (Ont.) | Asteraceae | T | 315 | NA | NA |
| 98 | #Cirsium vinaceum^ | Sacramento Mountains thistle | U.S.A. (NM) | Asteraceae | T | 276 | NA | NA |
| 99 | #Clarkia speciosa ssp. immaculata^ | Clarkia, Pismo | U.S.A. (CA) | Onagraceae | E | 567 | | |
| 100 | #Clematis morefieldii^ | Morefield's leather-flower | U.S.A. (AL) | Ranunculaceae | E | 468 | NA | NA |
| 101 | #Clematis socialis^ | Alabama leather-flower | U.S.A. (AL) | Ranunculaceae | E | 245 | NA | NA |
| 102 | #Clermontia lindseyana^ | `Oha wai | U.S.A. (HI) | Campanulaceae | E | 532 | NA | NA |
| 103 | #Clermontia oblongifolia^ ssp. #brevipes^ | `Oha wai | U.S.A. (HI) | Campanulaceae | E | 480 | NA | NA |
| 104 | #Clermontia oblongifolia^ ssp. #mauiensis^ | `Oha wai | U.S.A. (HI) | Campanulaceae | E | 467 | NA | NA |
| 105 | #Clermontia peleana^ | `Oha wai | U.S.A. (HI) | Campanulaceae | E | 532 | NA | NA |
| 106 | #Clermontia pyrularia^ | `Oha wai | U.S.A. (HI) | Campanulaceae | E | 532 | NA | NA |
| 107 | #Clitoria fragrans^ | Pigeon wings | U.S.A. (FL) | Fabaceae | T | 500 | NA | NA |
| 108 | #Colubrina oppositifolia^ | Kauila | U.S.A. (HI) | Rhamnaceae | E | 532 | NA | NA |
| 109 | #Conradina brevifolia^ | Short-leaved rosemary | U.S.A. (FL) | Lamiaceae | E | 507 | NA | NA |
| 110 | #Conradina etonia^ | Etonia rosemary | U.S.A. (FL) | Lamiaceae | E | 507 | NA | NA |
| 111 | #Conradina glabra^ | Apalachicola rosemary | U.S.A. (FL) | Lamiaceae | E | 507 | NA | NA |
| 112 | #Conradina verticillata^ | Cumberland rosemary | U.S.A. (KY, TN) | Lamiaceae | T | 452 | NA | NA |
| 113 | #Cordylanthus maritimus^ ssp. #maritimus^ | Salt marsh bird's-beak | U.S.A. (CA), Mexico (Baja California) | Scrophulariaceae | E | 44 | NA | NA |
| 114 | #Cordylanthus palmatus^ | Palmate-bracted bird's-beak | U.S.A. (CA) | Scrophulariaceae | E | 235 | NA | NA |
| 115 | #Cornutia obovata^ | Palo de nigua (=capá jugüerilla) | U.S.A. (PR) | Verbenaceae | E | 307 | NA | NA |
| 116 | #Coryphantha minima (=C. nellieae, Escobaria m., E. n., Mammillaria n.^) | Nellie cory cactus | U.S.A. (TX) | Cactaceae | E | 81 | NA | NA |
| 117 | #Coryphantha ramillosa^ | Bunched cory cactus | U.S.A. (TX), Mexico (Coahuila) | Cactaceae | T | 77 | NA | NA |
| 118 | #Coryphantha robbinsorum (=Cochiseia r., Escobaria r.)^ | Cochise pincushion cactus | U.S.A. (AZ), Mexico (Sonora) | Cactaceae | T | 214 | NA | NA |
| 119 | #Coryphantha scheeri^ var. #robustispina^ | Pima pineapple cactus | U.S.A. (AZ), Mexico (Sonora) | Cactaceae | E | 515 | NA | NA |
| 120 | #Coryphantha sneedii^ var. #leei (=Escobaria l., Mammillaria l.)^ | Lee pincushion cactus | U.S.A. (NM) | Cactaceae | T | 61 | NA | NA |
| 121 | #Coryphantha sneedii^ var. #sneedii (=Escobaria s., Mammillaria s.)^ | Sneed pincushion cactus | U.S.A. (NM, TX) | Cactaceae | E | 82 | NA | NA |
| 122 | #Cranichis ricartii^ | None | U.S.A. (PR) | Orchidaceae | E | 451 | NA | NA |
| 123 | #Crescentia portoricensis^ | Higuero de Sierra | U.S.A. (PR) | Bignoniaceae | E | 301 | NA | NA |
| 124 | #Crotalaria avonensis^ | Avon Park harebells | U.S.A. (FL) | Fabaceae | E | 500 | NA | NA |
| 125 | #Cryptantha crassipes^ | Terlingua Creek cats-eye | U.S.A. (TX) | Boraginaceae | E | 439 | NA | NA |
| 126 | #Cucurbita okeechobeensis^ ssp. #okeechobeensis^ | Okeechobee gourd | U.S.A. (FL) | Cucurbitaceae | E | 507, 537 | NA | NA |
| 127 | #Cyanea asarifolia^ | Haha | U.S.A. (HI) | Campanulaceae | E | 530 | NA | NA |
| 128 | #Cyanea copelandii^ ssp. #copelandii^ | Haha | U.S.A. (HI) | Campanulaceae | E | 532 | NA | NA |
| 129 | #Cyanea grimesiana^ ssp. #obatae^ | Haha | U.S.A. (HI) | Campanulaceae | E | 541 | NA | NA |
| 130 | #Cyanea hamatiflora^ ssp. #carlsonii^ | Haha | U.S.A. (HI) | Campanulaceae | E | 532 | NA | NA |
| 131 | #Cyanea lobata^ | Haha | U.S.A. (HI) | Campanulaceae | E | 467 | NA | NA |
| 132 | #Cyanea macrostegia^ ssp. #gibsonii^ | None | U.S.A. (HI) | Campanulaceae | E | 435 | NA | NA |
| 133 | #Cyanea mannii^ | Haha | U.S.A. (HI) | Campanulaceae | E | 480 | NA | NA |
| 134 | #Cyanea mceldowneyi^ | Haha | U.S.A. (HI) | Campanulaceae | E | 467 | NA | NA |
| 135 | #Cyanea pinnatifida^ | Haha | U.S.A. (HI) | Campanulaceae | E | 448 | NA | NA |
| 136 | #Cyanea procera^ | Haha | U.S.A. (HI) | Campanulaceae | E | 480 | NA | NA |
| 137 | #Cyanea shipmannii^ | Haha | U.S.A. (HI) | Campanulaceae | E | 532 | NA | NA |
| 138 | #Cyanea stictophylla^ | Haha | U.S.A. (HI) | Campanulaceae | E | 532 | NA | NA |
| 139 | #Cyanea superba^ | None | U.S.A. (HI) | Campanulaceae | E | 467 | NA | NA |
| 140 | #Cyanea truncata^ | Haha | U.S.A. (HI) | Campanulaceae | E | 536 | NA | NA |
| 141 | #Cyanea undulata^ | None | U.S.A. (HI) | Campanulaceae | E | 436 | NA | NA |
| 142 | #Cycladenia humilis^ var. #jonesii^ | Jones cycladenia | U.S.A. (AZ, UT) | Apocynaceae | T | 229 | NA | NA |
| 143 | #Cyrtandra crenata^ | Ha`iwale | U.S.A. (HI) | Gesneriaceae | E | 536 | NA | NA |
| 144 | #Cyrtandra giffardii^ | Ha`iwale | U.S.A. (HI) | Gesneriaceae | E | 532 | NA | NA |
| 145 | #Cyrtandra limahuliensis^ | Ha`iwale | U.S.A. (HI) | Gesneriaceae | T | 530 | NA | NA |
| 146 | #Cyrtandra munroi^ | Ha`iwale | U.S.A. (HI) | Gesneriaceae | E | 467 | NA | NA |
| 147 | #Cyrtandra polyantha^ | Ha`iwale | U.S.A. (HI) | Gesneriaceae | E | 536 | NA | NA |
| 148 | #Cyrtandra tintinnabula^ | Ha`iwale | U.S.A. (HI) | Gesneriaceae | E | 532 | NA | NA |
| 149 | #Dalea foliosa (=Petalostemum f.)^ | Leafy prairie-clover | U.S.A. (AL, IL, TN) | Fabaceae | E | 422 | NA | NA |
| 150 | #Daphnopsis hellerana^ | None | U.S.A. (PR) | Thymelaeaceae | E | 309 | NA | NA |
| 151 | #Deeringothamnus pulchellus^ | Beautiful pawpaw | U.S.A. (FL) | Annonaceae | E | 244 | NA | NA |
| 152 | #Deeringothamnus rugelii^ | Rugel's pawpaw | U.S.A. (FL) | Annonaceae | E | 244 | NA | NA |
| 153 | #Delissea rhytidosperma^ | None | U.S.A. (HI) | Campanulaceae | E | 530 | NA | NA |
| 154 | #Delphinium variegatum^ ssp. #kinkiense (=D. k.)^ | San Clemente Island larkspur | U.S.A. (CA) | Ranunculaceae | E | 26 | NA | NA |
| 155 | #Dicerandra christmanii^ | Garrett's mint | U.S.A. (FL) | Lamiaceae | E | 207, 362 | NA | NA |
| 156 | #Dicerandra cornutissima^ | Longspurred mint | U.S.A. (FL) | Lamiaceae | E | 207 | NA | NA |
| 157 | #Dicerandra frutescens^ | Scrub mint | U.S.A. (FL) | Lamiaceae | E | 207, 362 | NA | NA |
| 158 | #Dicerandra immaculata^ | Lakela's mint | U.S.A. (FL) | Lamiaceae | E | 180 | NA | NA |
| 159 | #Dodecahema leptoceras (=Centrostegia l.)^ | Slender-horned spineflower | U.S.A. (CA) | Polygonaceae | E | 291 | NA | NA |
| 160 | #Dubautia herbstobatae^ | Na`ena`e | U.S.A. (HI) | Asteraceae | E | 448 | NA | NA |
| 161 | #Dubautia latifolia^ | None | U.S.A. (HI) | Asteraceae | E | 464 | NA | NA |
| 162 | #Dubautia pauciflorula^ | None | U.S.A. (HI) | Asteraceae | E | 436 | NA | NA |
| 163 | #Dudleya traskiae^ | Santa Barbara Island liveforever | U.S.A. (CA) | Crassulaceae | E | 39 | NA | NA |
| 164 | #Echinacea laevigata^ | Smooth coneflower | U.S.A. (GA, MD, NC, PA, SC, VA) | Asteraceae | E | 481 | NA | NA |
| 165 | #Echinacea tennesseensis^ | Tennessee purple coneflower | U.S.A. (TN) | Asteraceae | E | 49 | NA | NA |
| 166 | #Echinocactus horizonthalonius^ var. #nicholii^ | Nichol's Turk's head cactus | U.S.A. (AZ) | Cactaceae | E | 71 | NA | NA |
| 167 | #Echinocereus chisoensis^ var. #chisoensis (=E. reichenbachii^ var. #c.^) | Chisos Mountain hedgehog cactus | U.S.A. (TX) | Cactaceae | T | 335 | NA | NA |
| 168 | #Echinocereus fendleri^ var. #kuenzleri (=E. kuenzleri, E. hempelii^ of authors, not Fobe) | Kuenzler hedgehog cactus | U.S.A. (NM) | Cactaceae | E | 70 | NA | NA |
| 169 | #Echinocereus lloydii (=E. roetteri var. l.^) | Lloyd's hedgehog cactus | U.S.A. (NM, TX) | Cactaceae | E | 67 | NA | NA |
| 170 | #Echinocereus reichenbachii^ var. #albertii (=E. melanocentrus)^ | Black lace cactus | U.S.A. (TX) | Cactaceae | E | 68 | NA | NA |
| 171 | #Echinocereus triglochidiatus^ var. #arizonicus (=E. arizonicus)^ | Arizona hedgehog cactus | U.S.A. (AZ) | Cactaceae | E | 62 | NA | NA |
| 172 | #Echinocereus viridiflorus^ var. #davisii (=E. davisii)^ | Davis' green pitaya | U.S.A. (TX) | Cactaceae | E | 81 | NA | NA |
| 173 | #Echinomastus mariposensis (=Echinocactus m., Sclerocactus m., Neolloydia m.)^ | Lloyd's Mariposa cactus | U.S.A. (TX), Mexico (Coahuila) | Cactaceae | T | 77 | NA | NA |
| 174 | #Enceliopsis nudicaulis^ var. #corrugata^ | Ash Meadows sunray | U.S.A. (NV) | Asteraceae | T | 181 | 17.96(a) | NA |
| 175 | #Eremalche kernensis (=E. parryi^ ssp. #k.^) | Kern mallow | U.S.A. (CA) | Malvaceae | E | 395 | NA | NA |
| 176 | #Eriastrum densifolium^ ssp. #sanctorum^ | Santa Ana River woolly-star | U.S.A. (CA) | Polemoniaceae | E | 291 | NA | NA |
| 177 | #Eriastrum hooveri^ | Hoover's woolly-star | U.S.A. (CA) | Polemoniaceae | T | 395 | NA | NA |
| 178 | #Erigeron maguirei^ var. #maguirei^ | Maguire daisy | U.S.A. (UT) | Asteraceae | E | 202 | NA | NA |
| 179 | #Erigeron parishii^ | Parish's daisy | U.S.A. (CA) | Asteraceae | T | 548 | NA | NA |
| 180 | #Erigeron rhizomatus^ | Zuni (=Rhizome) fleabane | U.S.A. (NM) | Asteraceae | T | 177 | NA | NA |
| 181 | #Eriodictyon altissimum^ | Mountain balm, Indian Knob | U.S.A. (CA) | Hydrophyllaceae | E | 567 | NA | NA |
| 182 | #Eriogonum gypsophilum^ | Gypsum wild-buckwheat | U.S.A. (NM) | Polygonaceae | T | 110, 112 | 17.96(a) | NA |
| 183 | #Eriogonum longifolium^ var. #gnaphalifolium^ | Scrub buckwheat | U.S.A. (FL) | Polygonaceae | T | 500 | NA | NA |
| 184 | #Eriogonum ovalifolium^ var. # vineum^ | Cushenbury buckwheat | U.S.A. (CA) | Polygonaceae | E | 548 | NA | NA |
| 185 | #Eriogonum ovalifolium^ var. #williamsiae^ | Steamboat buckwheat | U.S.A. (NV) | Polygonaceae | E | 237 | NA | NA |
| 186 | #Eriogonum pelinophilum^ | Clay-loving wild-buckwheat | U.S.A. (CO) | Polygonaceae | E | 151 | 17.96(a) | NA |
| 187 | #Eryngium aristulatum^ var. #parishii^ | San Diego button-celery | U.S.A. (CA) | Apiaceae | E | 512 | NA | NA |
| 188 | #Eryngium constancei^ | Loch Lomond coyote-thistle | U.S.A. (CA) | Apiaceae | E | 194E, 249 | NA | NA |
| 189 | #Eryngium cuneifolium^ | Snakeroot | U.S.A. (FL) | Apiaceae | E | 256 | NA | NA |
| 190 | #Erysimum capitatum^ var. #angustatum^ | Contra Costa wallflower | U.S.A. (CA) | Brassicaceae | E | 39 | 17.96(a) | NA |
| 191 | #Erysimum menziesii^ | Menzies' wallflower | U.S.A. (CA) | Brassicaceae | E | 472 | NA | NA |
| 192 | #Erysimum teretifolium^ | Wallflower, Ben Lomond | U.S.A. (CA) | Brassicacae | E | 528 | NA | NA |
| 193 | #Erythronium propullans^ | Minnesota trout lily | U.S.A. (MN) | Liliaceae | E | 221 | NA | NA |
| 194 | #Eugenia haematocarpa^ | Uvillo | U.S.A. (PR) | Myrtaceae | E | 564 | NA | NA |
| 195 | #Eugenia koolauensis^ | Nioi | U.S.A. (HI) | Myrtaceae | E | 536 | NA | NA |
| 196 | #Eugenia woodburyana^ | None | U.S.A. (PR) | Myrtaceae | E | 551 | NA | NA |
| 197 | #Euphorbia telephioides^ | Telephus spurge | U.S.A. (FL) | Euphorbiaceae | T | 463 | NA | NA |
| 198 | #Eutrema penlandii^ | Penland alpine fen mustard | U.S.A. (CO) | Brassicaceae | T | 509 | NA | NA |
| 199 | #Exocarpos luteolus^ | Heau | U.S.A. (HI) | Santalaceae | E | 530 | NA | NA |
| 200 | #Flueggea neowawraea^ | Mehamehame | U.S.A. (HI) | Euphorbiaceae | E | 559 | NA | NA |
| 201 | #Frankenia johnstonii^ | Johnston's frankenia | U.S.A. (TX), Mexico (Nuevo Leon) | Frankeniaceae | E | 155 | NA | NA |
| 202 | #Gahnia lanaiensis^ | None | U.S.A. (HI) | Cyperaceae | E | 435 | NA | NA |
| 203 | #Galactia smallii^ | Small's milkpea | U.S.A. (FL) | Fabaceae | E | 192 | NA | NA |
| 204 | #Gardenia brighamii^ | Na`u or Hawaiian gardenia | U.S.A. (HI) | Rubiaceae | E | 198 | NA | NA |
| 205 | #Geocarpon minimum^ | None | U.S.A. (AR, LA, MO) | Caryophyllaceae | T | 275 | NA | NA |
| 206 | #Geranium arboreum^ | Hawaiian red-flowered geranium | U.S.A. (HI) | Geraniaceae | E | 465 | NA | NA |
| 207 | #Geranium multiflorum^ | Nohoanu | U.S.A. (HI) | Geraniaceae | E | 467 | NA | NA |
| 208 | #Geum radiatum^ | Spreading avens | U.S.A. (NC, TN) | Rosaceae | E | 381 | NA | NA |
| 209 | #Gilia tenuiflora^ ssp. #arenaria^ | Monterey gilia | U.S.A. (CA) | Polemoniaceae | E | 472 | NA | NA |
| 210 | #Goetzea elegans^ | Beautiful goetzea or matabuey | U.S.A. (PR) | Solanaceae | E | 176 | NA | NA |
| 211 | #Gouania hillebrandii^ | None | U.S.A. (HI) | Rhamnaceae | E | 165 | 17.96(a) | NA |
| 212 | #Gouania meyenii^ | None | U.S.A. (HI) | Rhamnaceae | E | 448 | NA | NA |
| 213 | #Gouania vitifolia^ | None | U.S.A. (HI) | Rhamnaceae | E | 541 | NA | NA |
| 214 | #Grindelia fraxino-pratensis^ | Ash Meadows gumplant | U.S.A. (CA, NV) | Asteraceae | T | 181 | 17.96(a) | NA |
| 215 | #Haplostachys haplostachya^ var. #angustifolia^ | None | U.S.A. (HI) | Lamiaceae | E | 73 | NA | NA |
| 216 | #Harperocallis flava^ | Harper's beauty | U.S.A. (FL) | Liliaceae | E | 57 | NA | NA |
| 217 | #Harrisia portoricensis (=Cereus p.)^ | Higo chumbo | U.S.A. (PR) | Cactaceae | T | 397 | NA | NA |
| 218 | #Hedeoma todsenii^ | Todsen's pennyroyal | U.S.A. (NM) | Lamiaceae | E | 110, 112 | 17.96(a) | NA |
| 219 | #Hedyotis cookiana^ | `Awiwi | U.S.A. (HI) | Rubiaceae | E | 530 | NA | NA |
| 220 | #Hedyotis coriacea^ | Kio`ele | U.S.A. (HI) | Rubiaceae | E | 467 | NA | NA |
| 221 | #Hedyotis degeneri^ | None | U.S.A. (HI) | Rubiaceae | E | 448 | NA | NA |
| 222 | #Hedyotis mannii^ | Pilo | U.S.A. (HI) | Rubiaceae | E | 480 | NA | NA |
| 223 | #Hedyotis parvula^ | None | U.S.A. (HI) | Rubiaceae | E | 448 | NA | NA |
| 224 | #Hedyotis purpurea^ var. #montana^ | Roan Mountain bluet | U.S.A. (NC, TN) | Rubiaceae | E | 381 | NA | NA |
| 225 | #Hedyotis st.-johnii^ | Na Pali beach hedyotis | U.S.A. (HI) | Rubiaceae | E | 441 | NA | NA |
| 226 | #Helianthus schweinitzii^ | Schweinitz's sunflower | U.S.A. (NC, SC) | Asteraceae | E | 424 | NA | NA |
| 227 | #Helonias bullata^ | Swamp pink | U.S.A. (DE, GA, MD, NC, NJ, NY, SC, VA) | Liliaceae | T | 326 | NA | NA |
| 228 | #Hesperomannia arborescens^ | None | U.S.A. (HI) | Asteraceae | E | 536 | NA | NA |
| 229 | #Hesperomannia arbuscula^ | None | U.S.A. (HI) | Asteraceae | E | 448 | NA | NA |
| 230 | #Hesperomannia lydgatei^ | None | U.S.A. (HI) | Asteraceae | E | 436 | NA | NA |
| 231 | #Hexastylis naniflora^ | Dwarf-flowered heartleaf | U.S.A. (NC, SC) | Aristolochiaceae | T | 347 | NA | NA |
| 232 | #Hibiscadelphus distans^ | Kauai hau kuahiwi | U.S.A. (HI) | Malvaceae | E | 225 | NA | NA |
| 233 | #Hibiscus arnottianus^ ssp. #immaculatus^ | Koki`o ke`oke`o | U.S.A. (HI) | Malvaceae | E | 480 | NA | NA |
| 234 | #Hibiscus brackenridgei^ | Ma`o hau hele | U.S.A. (HI) | Malvaceae | E | 559 | NA | NA |
| 235 | #Hibiscus clayi^ | Hibiscus, Clay's | U.S.A. (HI) | Malvaceae | E | 530 | NA | NA |
| 236 | #Hoffmannseggia tenella^ | Slender rush-pea | U.S.A. (TX) | Fabaceae | E | 209 | NA | NA |
| 237 | #Howellia aquatilis^ | Howellia, water | U.S.A. (CA, ID, MT, OR, WA) | Campanulaceae | T | 542 | NA | NA |
| 238 | #Hudsonia montana^ | Mountain golden heather | U.S.A. (NC) | Cistaceae | T | 107 | 17.96(a) | NA |
| 239 | #Hymenoxys herbacea (=acaulis ^ var. # glabra^) | Lakeside daisy | U.S.A. (IL, OH), Canada (Ont.) | Asteraceae | T | 310 | NA | NA |
| 240 | #Hymenoxys texana^ | Texas prairie dawn-flower (=Texas bitterweed) | U.S.A. (TX) | Asteraceae | E | 218 | NA | NA |
| 241 | #Hypericum cumulicola^ | Highlands scrub hypericum | U.S.A. (FL) | Hypericaceae | E | 256 | NA | NA |
| 242 | #Ilex cookii^ | Cook's holly | U.S.A. (PR) | Aquifoliaceae | E | 277 | NA | NA |
| 243 | #Ilex sintenisii^ | None | U.S.A. (PR) | Aquifoliaceae | E | 461 | NA | NA |
| 244 | #Iliamna corei^ | Peter's Mountain mallow | U.S.A. (VA) | Malvaceae | E | 230 | NA | NA |
| 245 | #Ipomopsis sancti-spiritus^ | Holy Ghost ipomopsis | U.S.A. (NM) | Polemoniaceae | E | 535 | NA | NA |
| 246 | #Iris lacustris^ | Dwarf lake iris | U.S.A. (MI, WI), Canada (Ont.) | Iridaceae | T | 330 | NA | NA |
| 247 | #Ischaemum byrone^ | Hilo ischaemum | U.S.A. (HI) | Poaceae | E | 532 | NA | NA |
| 248 | #Isodendrion hosakae^ | Aupaka | U.S.A. (HI) | Violaceae | E | 414 | NA | NA |
| 249 | #Isodendrion pyrifolium^ | Wahine noho kula | U.S.A. (HI) | Violaceae | E | 532 | NA | NA |
| 250 | #Isotria medeoloides^ | Small whorled pogonia | U.S.A. (CT, DC, DE, GA, IL, MA, MD, ME, MI, MO, NC, NH, NJ, NY, PA, RI, SC, TN, VA, VT), Canada (Ont.) | Orchidaceae | T | 122, 556 | NA | NA |
| 251 | #Ivesia kingii^ var. #eremica^ | Ash Meadows ivesia | U.S.A. (NV) | Rosaceae | T | 181 | 17.96(a) | NA |
| 252 | #Jacquemontia reclinata^ | Beach jacquemontia | U.S.A. (FL) | Convolvulaceae | E | 523 | NA | NA |
| 253 | #Jatropha costaricensis^ | Costa Rican jatropha | Costa Rica | Euphorbiaceae | E | 154 | NA | NA |
| 254 | #Justicia cooleyi^ | Cooley's water-willow | U.S.A. (FL) | Acanthaceae | E | 356 | NA | NA |
| 255 | #Kokia cookei^ | Cooke's koki`o | U.S.A. (HI) | Malvaceae | E | 74 | NA | NA |
| 256 | #Kokia drynarioides^ | Koki`o (=hau-hele`ula or Hawaii tree cotton) | U.S.A. (HI) | Malvaceae | E | 167 | 17.96(a) | NA |
| 257 | #Labordia lydgatei^ | Kamakahala | U.S.A. (HI) | Loganiaceae | E | 436 | NA | NA |
| 258 | #Lasthenia burkei^ | Burke's goldfields | U.S.A. (CA) | Asteraceae | E | 453 | NA | NA |
| 259 | #Layia carnosa^ | Beach layia | U.S.A. (CA) | Asteraceae | E | 472 | NA | NA |
| 260 | #Lembertia congdonii^ | San Joaquin wooly-threads | U.S.A. (CA) | Asteraceae | E | 395 | NA | NA |
| 261 | #Lepanthes eltoroensis^ | None | U.S.A. (PR) | Orchidaceae | E | 451 | NA | NA |
| 262 | #Lepidium barnebyanum^ | Barneby ridge-cress (=peppercress) | U.S.A. (UT) | Brassicaceae | E | 402 | NA | NA |
| 263 | #Leptocereus grantianus^ | None | U.S.A. (PR) | Cactaceae | E | 491 | NA | NA |
| 264 | #Lespedeza leptostachya^ | Prairie bush-clover | U.S.A. (IA, IL, MN, WI) | Fabaceae | T | 254 | NA | NA |
| 265 | #Lesquerella congesta^ | Dudley Bluffs bladderpod | U.S.A. (CO) | Brassicaceae | T | 374 | NA | NA |
| 266 | #Lesquerella filiformis^ | Missouri bladderpod | U.S.A. (MO) | Brassicaceae | E | 253 | NA | NA |
| 267 | #Lesquerella kingii ^ ssp. #bernardina^ | San Bernardino Mountains bladderpod | U.S.A. (CA) | Brassicaceae | E | 548 | NA | NA |
| 268 | #Lesquerella lyrata^ | Lyrate bladderpod | U.S.A. (AL) | Brassicaceae | T | 403 | NA | NA |
| 269 | #Lesquerella pallida^ | White bladderpod | U.S.A. (TX) | Brassicaceae | E | 260 | NA | NA |
| 270 | #Lesquerella tumulosa^ | Kodachrome bladderpod | U.S.A. (UT) | Brassicaceae | E | 519 | NA | NA |
| 271 | #Liatris helleri^ | Heller's blazingstar | U.S.A. (NC) | Asteraceae | T | 300 | NA | NA |
| 272 | #Liatris ohlingerae^ | Scrub blazingstar | U.S.A. (FL) | Asteraceae | E | 356 | NA | NA |
| 273 | #Lilium occidental^ | Western lily | U.S.A. (OR, CA) | Liliaceae | E | 544 | NA | NA |
| 274 | #Limnanthes floccosa^ ssp. #californica^ | Butte County meadowfoam | U.S.A. (CA) | Limnanthaceae | E | 471 | NA | NA |
| 275 | #Limnanthes vinculans^ | Sebastopol meadowfoam | U.S.A. (CA) | Limnanthaceae | E | 453 | NA | NA |
| 276 | #Lindera melissifolia^ | Pondberry | U.S.A. (AL, AR, FL, GA, LA, MO, MS, NC, SC) | Lauraceae | E | 240 | NA | NA |
| 277 | #Lipochaeta fauriei^ | Nehe | U.S.A. (HI) | Asteraceae | E | 530 | NA | NA |
| 278 | #Lipochaeta kamolensis^ | Nehe | U.S.A. (HI) | Asteraceae | E | 467 | NA | NA |
| 279 | #Lipochaeta lobata^ var. #leptophylla^ | Nehe | U.S.A. (HI) | Asteraceae | E | 448 | NA | NA |
| 280 | #Lipochaeta micrantha^ | Nehe | U.S.A. (HI) | Asteraceae | E | 530 | NA | NA |
| 281 | #Lipochaeta tenuifolia^ | Nehe | U.S.A. (HI) | Asteraceae | E | 448 | NA | NA |
| 282 | #Lipochaeta venosa^ | None | U.S.A. (HI) | Asteraceae | E | 73 | NA | NA |
| 283 | #Lipochaeta waimeaensis^ | Nehe | U.S.A. (HI) | Asteraceae | E | 530 | NA | NA |
| 284 | #Lobelia niihauensis^ | None | U.S.A. (HI) | Campanulaceae | E | 448 | NA | NA |
| 285 | #Lobelia oahuensis^ | None | U.S.A. (HI) | Campanulaceae | E | 536 | NA | NA |
| 286 | #Lomatium bradshawii^ | Bradshaw's desert-parsley (=lomatium) | U.S.A. (OR) | Apiaceae | E | 333 | NA | NA |
| 287 | #Lotus dendroideus^ ssp. #traskiae (=L. scoparius^ ssp. #t.^) | San Clemente Island broom | U.S.A. (CA) | Fabaceae | E | 26 | NA | NA |
| 288 | #Lupinus aridorum^ | Scrub lupine | U.S.A. (FL) | Fabaceae | E | 264 | NA | NA |
| 289 | #Lupinus tidestromii^ | Clover lupine | U.S.A. (CA) | Fabaceae | E | 472 | NA | NA |
| 290 | #Lyonia truncata^ var. #proctorii^ | None | U.S.A. (PR) | Ericaceae | E | 501 | NA | NA |
| 291 | #Lysimachia asperulaefolia^ | Rough-leaved loosestrife | U.S.A. (NC, SC) | Primulaceae | E | 274 | NA | NA |
| 292 | #Lysimachia filifolia^ | None | U.S.A. (HI) | Primulaceae | E | 530 | NA | NA |
| 293 | #Lysimachia lydgatei^ | None | U.S.A. (HI) | Primulaceae | E | 467 | NA | NA |
| 294 | #Macbridea alba^ | White birds-in-a-nest | U.S.A. (FL) | Lamiaceae | T | 463 | NA | NA |
| 295 | #Malacothamnus clementinus^ | San Clemente Island bush-mallow | U.S.A. (CA) | Malvaceae | E | 26 | NA | NA |
| 296 | #Manihot walkerae^ | Walker's manioc | U.S.A. (TX), Mexico | Euphorbiaceae | E | 445 | NA | NA |
| 297 | #Mariscus fauriei^ | None | U.S.A. (HI) | Cyperaceae | E | 532 | NA | NA |
| 298 | #Mariscus pennatiformis^ | None | U.S.A. (HI) | Cyperaceae | E | 559 | NA | NA |
| 299 | #Marshallia mohrii^ | Mohr's Barbara's buttons | U.S.A. (AL, GA) | Asteraceae | T | 324 | NA | NA |
| 300 | #Melicope adscendens^ | Alani | U.S.A. (HI) | Rutaceae | E | 565 | NA | NA |
| 301 | #Melicope balloui^ | Alani | U.S.A. (HI) | Rutaceae | E | 565 | NA | NA |
| 302 | #Melicope haupuensis^ | Alani | U.S.A. (HI) | Rutaceae | E | 530 | NA | NA |
| 303 | #Melicope knudsenii^ | Alani | U.S.A. (HI) | Rutaceae | E | 530 | NA | NA |
| 304 | #Melicope lydgatei (=Pelea l.)^ | Alani | U.S.A. (HI) | Rutaceae | E | 536 | NA | NA |
| 305 | #Melicope mucronulata (=Pelea m.)^ | Alani | U.S.A. (HI) | Rutaceae | E | 467 | NA | NA |
| 306 | #Melicope ovalis^ | Alani | U.S.A. (HI) | Rutaceae | E | 565 | NA | NA |
| 307 | #Melicope pallida^ | Alani | U.S.A. (HI) | Rutaceae | E | 530 | NA | NA |
| 308 | #Melicope quadrangularis^ | Alani | U.S.A. (HI) | Rutaceae | E | 530 | NA | NA |
| 309 | #Melicope reflexa^ | Alani | U.S.A. (HI) | Rutaceae | E | 480 | NA | NA |
| 310 | #Mentzelia leucophylla^ | Ash Meadows blazing-star | U.S.A. (NV) | Loasaceae | T | 181 | 17.96(a) | NA |
| 311 | #Mimulus glabratus^ var. #michiganensis^ | Michigan monkey-flower | U.S.A. (MI) | Scrophulariaceae | E | 392 | NA | NA |
| 312 | #Mirabilis macfarlanei^ | MacFarlane's four-o'clock | U.S.A. (ID, OR) | Nyctaginaceae | E | 66 | NA | NA |
| 313 | #Mitracarpus maxwelliae^ | None | U.S.A. (PR) | Rubiaceae | E | 551 | NA | NA |
| 314 | #Mitracarpus polycladus^ | None | U.S.A. (PR), Saba | Rubiaceae | E | 551 | NA | NA |
| 315 | #Munroidendron racemosum^ | None | U.S.A. (HI) | Araliaceae | E | 530 | NA | NA |
| 316 | #Myrcia paganii^ | None | U.S.A. (PR) | Myrtaceae | E | 529 | NA | NA |
| 317 | #Neraudia angulata^ | None | U.S.A. (HI) | Urticaceae | E | 448 | NA | NA |
| 318 | #Neraudia sericea^ | None | U.S.A. (HI) | Urticaceae | E | 559 | NA | NA |
| 319 | #Nitrophila mohavensis^ | Amargosa niterwort | U.S.A. (CA, NV) | Chenopodiaceae | E | 181 | 17.96(a) | NA |
| 320 | #Nolina brittoniana^ | Britton's beargrass | U.S.A. (FL) | Agavaceae | E | 500 | NA | NA |
| 321 | #Nothocestrum breviflorum^ | `Aiea | U.S.A. (HI) | Solanaceae | E | 532 | NA | NA |
| 322 | #Nothocestrum peltatum^ | `Aiea | U.S.A. (HI) | Solanaceae | E | 530 | NA | NA |
| 323 | #Nototrichium humile^ | Kulu`i | U.S.A. (HI) | Amaranthaceae | E | 448 | NA | NA |
| 324 | #Ochrosia kilaueaensis^ | Holei | U.S.A. (HI) | Apocynaceae | E | 532 | NA | NA |
| 325 | #Oenothera avita^ ssp. #eurekensis^ | Eureka Valley evening-primrose | U.S.A. (CA) | Onagraceae | E | 39 | NA | NA |
| 326 | #Oenothera deltoides^ ssp. #howellii^ | Antioch Dunes evening-primrose | U.S.A. (CA) | Onagraceae | E | 39 | 17.96(a) | NA |
| 327 | #Opuntia treleasei^ | Bakersfield cactus | U.S.A. (CA) | Cactaceae | E | 395 | NA | NA |
| 328 | #Orcuttia californica^ | California Orcutt grass | U.S.A. (CA) | Poaceae | E | 512 | NA | NA |
| 329 | #Ottoschulzia rhodoxylon^ | Palo de rosa | U.S.A. (PR), Dominican Republic | Icacinaceae | E | 385 | NA | NA |
| 330 | #Oxypolis canbyi^ | Canby's dropwort | U.S.A. (DE, GA, MD, NC, SC) | Apiaceae | E | 217 | NA | NA |
| 331 | #Oxytheca parishii^ var. #goodmaniana^ | Cushenbury oxytheca | U.S.A. (CA) | Polygonaceae | E | 548 | NA | NA |
| 332 | #Oxytropis campestris^ var. #chartacea^ | Fassett's locoweed | U.S.A. (WI) | Fabaceae | T | 329 | NA | NA |
| 333 | #Panicum fauriei^ var. #carteri^ | Carter's panicgrass | U.S.A. (HI) | Poaceae | E | 133 | 17.96(a) | NA |
| 334 | #Paronychia chartacea (=Nyachia pulvinata)^ | Papery whitlow-wort | U.S.A. (FL) | Caryophyllaceae | T | 256 | NA | NA |
| 335 | #Pedicularis furbishiae^ | Furbish lousewort | U.S.A. (ME), Canada (N.B.) | Scrophulariaceae | E | 39 | NA | NA |
| 336 | #Pediocactus bradyi (=Toumeya b.)^ | Brady pincushion cactus | U.S.A. (AZ) | Cactaceae | E | 63 | NA | NA |
| 337 | #Pediocactus despainii^ | San Rafael cactus | U.S.A. (UT) | Cactaceae | E | 286 | NA | NA |
| 338 | #Pediocactus knowltonii (=P. bradyi^ var. #k., Toumeya k.)^ | Knowlton cactus | U.S.A. (CO, NM) | Cactaceae | E | 72 | NA | NA |
| 339 | #Pediocactus peeblesianus^ var. #peeblesianus (=Echinocactus p., Navajoa p., Toumeya p., Utahia p.)^ | Peebles Navajo cactus | U.S.A. (AZ) | Cactaceae | E | 69 | NA | NA |
| 340 | #Pediocactus sileri (=Echinocactus s., Utahia s.)^ | Siler pincushion cactus | U.S.A. (AZ, UT) | Cactaceae | T | 64, 524 | NA | NA |
| 341 | #Penstemon haydenii^ | Blowout penstemon | U.S.A. (NE) | Scrophulariaceae | E | 285 | NA | NA |
| 342 | #Penstemon penlandii^ | Penland beardtongue | U.S.A. (CO) | Scrophulariaceae | E | 353 | NA | NA |
| 343 | #Peperomia wheeleri^ | Wheeler's peperomia | U.S.A. (PR) | Piperaceae | E | 255 | NA | NA |
| 344 | #Peucedanum sandwicense^ | Makou | U.S.A. (HI) | Apiaceae | T | 530 | NA | NA |
| 345 | #Phacelia argillacea^ | Clay phacelia | U.S.A. (UT) | Hydrophyllaceae | E | 44 | NA | NA |
| 346 | #Phacelia formosula^ | North Park phacelia | U.S.A. (CO) | Hydrophyllaceae | E | 121 | NA | NA |
| 347 | #Phlox nivalis^ ssp. #texensis^ | Texas trailing phlox | U.S.A. (TX) | Polemoniaceae | E | 440 | NA | NA |
| 348 | #Phyllostegia glabra^ var. #lanaiensis^ | None | U.S.A. (HI) | Lamiaceae | E | 435 | NA | NA |
| 349 | #Phyllostegia mannii^ | None | U.S.A. (HI) | Lamiaceae | E | 480 | NA | NA |
| 350 | #Phyllostegia mollis^ | None | U.S.A. (HI) | Lamiaceae | E | 448 | NA | NA |
| 351 | #Phyllostegia waimeae^ | None | U.S.A. (HI) | Lamiaceae | E | 530 | NA | NA |
| 352 | #Physaria obcordata^ | Dudley Bluffs twinpod | U.S.A. (CO) | Brassicaceae | T | 374 | NA | NA |
| 353 | #Pilosocereus robinii (=Cereus r.)^ | Key tree-cactus | U.S.A. (FL), Cuba | Cactaceae | E | 153 | NA | NA |
| 354 | #Pinguicula ionantha^ | Godfrey's butterwort | U.S.A. (FL) | Lentibulariaceae | T | 507 | NA | NA |
| 355 | #Pityopsis ruthii (=Heterotheca r., Chrysopsis r.)^ | Ruth's golden aster | U.S.A. (TN) | Asteraceae | E | 191 | NA | NA |
| 356 | #Plantago hawaiensis^ | Laukahi kuahiwi | U.S.A. (HI) | Plantaginaceae | E | 532 | NA | NA |
| 357 | #Plantago princeps^ | Laukahi kuahiwi | U.S.A. (HI) | Plantaginaceae | E | 559 | NA | NA |
| 358 | #Platanthera leucophaea^ | Eastern prairie fringed orchid | U.S.A. (AR, IA, IL, IN, ME, MI, MO, NE, NJ, NY, OH, OK, PA, VA, WI), Canada (Ont., N.B.) | Orchidaceae | T | 368 | NA | NA |
| 359 | #Platanthera praeclara^ | Western prairie fringed orchid | U.S.A. (IA, KS, MN, MO, ND, NE, OK, SD), Canada (Man.) | Orchidaceae | T | 368 | NA | NA |
| 360 | #Pleodendron macranthum^ | Chupacallos (=Chupagallo) | U.S.A. (PR) | Canellaceae | E | 564 | NA | NA |
| 361 | #Poa mannii^ | Mann's bluegrass | U.S.A. (HI) | Poaceae | E | 558 | NA | NA |
| 362 | #Poa sandvicensis^ | Hawaiian bluegrass | U.S.A. (HI) | Poaceae | E | 464 | NA | NA |
| 363 | #Poa siphonoglossa^ | None | U.S.A. (HI) | Poaceae | E | 464 | NA | NA |
| 364 | #Pogogyne abramsii^ | San Diego mesa mint | U.S.A. (CA) | Lamiaceae | E | 44 | NA | NA |
| 365 | #Pogogyne nudiuscula^ | Otay mesa mint | U.S.A. (CA), Mexico (Baja California) | Lamiaceae | E | 512 | NA | NA |
| 366 | #Polygala lewtonii^ | Lewton's polygala | U.S.A. (FL) | Polygalaceae | E | 500 | NA | NA |
| 367 | #Polygala smallii^ | Tiny polygala | U.S.A. (FL) | Polygalaceae | E | 192 | NA | NA |
| 368 | #Polygonella basiramia (=P. ciliata^ var. #b.)^ | Wireweed | U.S.A. (FL) | Polygonaceae | E | 256 | NA | NA |
| 369 | #Polygonella myriophylla^ | Sandlace | U.S.A. (FL) | Polygonaceae | E | 500 | NA | NA |
| 370 | #Portulaca sclerocarpa^ | Po`e | U.S.A. (HI) | Portulacaceae | E | 532 | NA | NA |
| 371 | #Potamogeton clystocarpus^ | Little Aguja pondweed | U.S.A. (TX) | Potamogetonaceae | E | 450 | NA | NA |
| 372 | #Potentilla robbinsiana^ | Robbins' cinquefoil | U.S.A. (NH, VT) | Rosaceae | E | 104 | 17.96(a) | NA |
| 373 | #Primula maguirei^ | Maguire primrose | U.S.A. (UT) | Primulaceae | T | 199 | NA | NA |
| 374 | #Pritchardia affinis^ | Loulu | U.S.A. (HI) | Arecaceae | E | 532 | NA | NA |
| 375 | #Pritchardia munroi^ | Loulu | U.S.A. (HI) | Arecaceae | E | 480 | NA | NA |
| 376 | #Prunus geniculata^ | Scrub plum | U.S.A. (FL) | Rosaceae | E | 256 | NA | NA |
| 377 | #Pteralyxia kauaiensis^ | Kaulu | U.S.A. (HI) | Apocynaceae | E | 530 | NA | NA |
| 378 | #Ptilimnium nodosum (=P. fluviatile)^ | Harperella | U.S.A. (AL, AR, GA, MD, NC, SC, WV) | Apiaceae | E | 332 | NA | NA |
| 379 | #Purshia subintegra (=Cowania s.)^ | Arizona cliffrose | U.S.A. (AZ) | Rosaceae | E | 148 | NA | NA |
| 380 | #Quercus hinckleyi^ | Hinckley's oak | U.S.A. (TX) | Fagaceae | T | 318 | NA | NA |
| 381 | #Ranunculus acriformis (=R. acris^ var. #a.)^ | Autumn buttercup | U.S.A. (UT) | Ranunculaceae | E | 355 | NA | NA |
| 382 | #Remya kauaiensis^ | None | U.S.A. (HI) | Asteraceae | E | 413 | NA | NA |
| 383 | #Remya mauiensis^ | Maui remya | U.S.A. (HI) | Asteraceae | E | 413 | NA | NA |
| 384 | #Remya montgomeryi^ | None | U.S.A. (HI) | Asteraceae | E | 413 | NA | NA |
| 385 | #Rhododendron chapmanii^ | Chapman rhododendron | U.S.A. (FL) | Ericaceae | E | 47 | NA | NA |
| 386 | #Rhus michauxii^ | Michaux's sumac | U.S.A. (GA, NC, SC, VA) | Anacardiaceae | E | 367 | NA | NA |
| 387 | #Rhynchospora knieskernii^ | Knieskern's beaked-rush | U.S.A. (DE, NJ) | Cyperaceae | T | 429 | NA | NA |
| 388 | #Ribes echinellum^ | Miccosukee gooseberry | U.S.A. (FL, SC) | Saxifragaceae | T | 190 | NA | NA |
| 389 | #Rollandia crispa^ | None | U.S.A. (HI) | Campanulaceae | E | 536 | NA | NA |
| 390 | #Rorippa gambellii^ | Gambel's watercress | U.S.A. (CA) | Brassicaceae | E | 511 | NA | NA |
| 391 | #Sagittaria fasciculata^ | Bunched arrowhead | U.S.A. (NC, SC) | Alismataceae | E | 53 | NA | NA |
| 392 | #Sagittaria secundifolia^ | Kral's water-plantain | U.S.A. (AL, GA) | Alismataceae | T | 386 | NA | NA |
| 393 | #Sanicula mariversa^ | None | U.S.A. (HI) | Apiaceae | E | 448 | NA | NA |
| 394 | #Santalum freycinetianum^ var. #lanaiense^ | Lanai sandalwood or `iliahi | U.S.A. (HI) | Santalaceae | E | 215 | NA | NA |
| 395 | #Sarracenia oreophila^ | Green pitcher-plant | U.S.A. (AL, GA, NC, TN) | Sarraceniaceae | E | 56, 89 | NA | NA |
| 396 | #Sarracenia rubra^ ssp. #alabamensis (=S. alabamensis^ ssp. #alabamensis)^ | Alabama canebrake pitcher-plant | U.S.A. (AL) | Sarraceniaceae | E | 346 | NA | NA |
| 397 | #Sarracenia rubra^ ssp. #jonesii (=S. jonesii)^ | Mountain sweet pitcher-plant | U.S.A. (NC, SC) | Sarraceniaceae | E | 339 | NA | NA |
| 398 | #Scaevola coriacea^ | Dwarf naupaka | U.S.A. (HI) | Goodeniaceae | E | 231 | NA | NA |
| 399 | #Schiedea adamantis^ | Diamond Head schiedea | U.S.A. (HI) | Caryophyllaceae | E | 141 | NA | NA |
| 400 | #Schiedea apokremnos^ | Ma`oli`oli | U.S.A. (HI) | Caryophyllaceae | E | 441 | NA | NA |
| 401 | #Schiedea haleakalensis^ | None | U.S.A. (HI) | Caryophyllaceae | E | 467 | NA | NA |
| 402 | #Schiedea kaalae^ | None | U.S.A. (HI) | Caryophyllaceae | E | 448 | NA | NA |
| 403 | #Schiedea lydgatei^ | None | U.S.A. (HI) | Caryophyllaceae | E | 480 | NA | NA |
| 404 | #Schiedea spergulina^ var. #leiopoda^ | None | U.S.A. (HI) | Caryophyllaceae | E | 530 | NA | NA |
| 405 | #Schiedea spergulina^ var. #spergulina^ | None | U.S.A. (HI) | Caryophyllaceae | T | 530 | NA | NA |
| 406 | #Schoepfia arenaria^ | None | U.S.A. (PR) | Olacaceae | T | 420 | NA | NA |
| 407 | #Schoenocrambe argillacea^ | Clay reed-mustard | U.S.A. (UT) | Brassicaceae | T | 457 | NA | NA |
| 408 | #Schoenocrambe barnebyi^ | Barneby reed-mustard | U.S.A. (UT) | Brassicaceae | E | 457 | NA | NA |
| 409 | #Schoenocrambe suffrutescens (=Glaucocarpum s.)^ | Shrubby reed-mustard (=toad-flax cress) | U.S.A. (UT) | Brassicaceae | E | 293 | NA | NA |
| 410 | #Schwalbea americana^ | American chaffseed | U.S.A. (AL, CT, DE, FL, GA, MA, MD, MI, MS, NC, NJ, NY, SC, TN, VA) | Scrophulariaceae | E | 478 | NA | NA |
| 411 | #Scirpus ancistrochaetus^ | Northeastern (=Barbed bristle) bulrush | U.S.A. (MA, MD, NY, PA, VA, VT, WV) | Cyperaceae | E | 425 | NA | NA |
| 412 | #Sclerocactus glaucus (=Echinocactus g., E. subglaucus, E. whipplei^ var. #g., Pediocactus g., S. franklinii, S.^ | Uinta Basin hookless cactus | U.S.A. (CO, UT) | Cactaceae | T | 59 | NA | NA |
| 413 | #Sclerocactus mesae-verdae (=Coloradoa m., Echinocactus m., Pediocactus m.)^ | Mesa Verde cactus | U.S.A. (CO, NM) | Cactaceae | T | 75 | NA | NA |
| 414 | #Sclerocactus wrightiae (=Pediocactus w.)^ | Wright fishhook cactus | U.S.A. (UT) | Cactaceae | E | 58 | NA | NA |
| 415 | #Scutellaria floridana^ | Florida skullcap | U.S.A. (FL) | Lamiaceae | T | 463 | NA | NA |
| 416 | #Scutellaria montana^ | Large-flowered skullcap | U.S.A. (GA, TN) | Lamiaceae | E | 234 | NA | NA |
| 417 | #Sedum integrifolium^ ssp. #leedyi^ | Leedy's roseroot | U.S.A. (MN, NY) | Crassulaceae | T | 460 | NA | NA |
| 418 | #Senecio franciscanus^ | San Francisco Peaks groundsel | U.S.A. (AZ) | Asteraceae | T | 137 | 17.96(a) | NA |
| 419 | #Serianthes nelsonii^ | Hayun lagu (Guam), Tronkon guafi (Rota) | Western Pacific Ocean: U.S.A. (Guam, Rota) | Fabaceae | E | 257, 259 | NA | NA |
| 420 | #Sesbania tomentosa^ | `Ohai | U.S.A. (HI) | Fabaceae | E | 559 | NA | NA |
| 421 | #Sidalcea nelsoniana^ | Nelson's checker-mallow | U.S.A. (OR) | Malvaceae | T | 490 | NA | NA |
| 422 | #Sidalcea pedata^ | Pedate checker-mallow | U.S.A. (CA) | Malvaceae | E | 158 | NA | NA |
| 423 | #Silene alexandri^ | None | U.S.A. (HI) | Caryophyllaceae | E | 480 | NA | NA |
| 424 | #Silene hawaiiensis^ | None | U.S.A. (HI) | Caryophyllaceae | T | 532 | NA | NA |
| 425 | #Silene lanceolata^ | None | U.S.A. (HI) | Caryophyllaceae | E | 480 | NA | NA |
| 426 | #Silene perlmanii^ | None | U.S.A. (HI) | Caryophyllaceae | E | 448 | NA | NA |
| 427 | #Silene polypetala^ | Fringed campion | U.S.A. (FL, GA) | Caryophyllaceae | E | 418 | NA | NA |
| 428 | #Sisyrinchium dichotomum^ | White irisette | U.S.A. (NC) | Iridaceae | E | 438 | NA | NA |
| 429 | #Solanum drymophilum^ | Erubia | U.S.A. (PR) | Solanaceae | E | 319 | NA | NA |
| 430 | #Solanum incompletum^ | Popolo ku mai | U.S.A. (HI) | Solanaceae | E | 559 | NA | NA |
| 431 | #Solanum sandwicense^ | `Aiakeakua, popolo | U.S.A. (HI) | Solanaceae | E | 530 | NA | NA |
| 432 | #Solidago albopilosa^ | White-haired goldenrod | U.S.A. (KY) | Asteraceae | T | 308 | NA | NA |
| 433 | #Solidago houghtonii^ | Houghton's goldenrod | U.S.A. (MI), Canada (Ont.) | Asteraceae | T | 314 | NA | NA |
| 434 | #Solidago shortii^ | Short's goldenrod | U.S.A. (KY) | Asteraceae | E | 201 | NA | NA |
| 435 | #Solidago spithamaea^ | Blue Ridge goldenrod | U.S.A. (NC, TN) | Asteraceae | T | 175 | NA | NA |
| 436 | #Spermolepis hawaiiensis^ | None | U.S.A. (HI) | Apiaceae | E | 559 | NA | NA |
| 437 | #Spigelia gentianoides^ | Gentian pinkroot | U.S.A. (AL, FL) | Loganiaceae | E | 406 | NA | NA |
| 438 | #Spiranthes diluvialis^ | Ute ladies'-tresses | U.S.A. (CO, NV, UT) | Orchidaceae | T | 458 | NA | NA |
| 439 | #Spiranthes parksii^ | Navasota ladies'-tresses | U.S.A. (TX) | Orchidaceae | E | 116 | NA | NA |
| 440 | #Spiraea virginiana^ | Virginia spiraea | U.S.A. (GA, KY, NC, PA, TN, VA, WV) | Rosaceae | T | 389 | NA | NA |
| 441 | #Stahlia monosperma^ | Cóbana negra | U.S.A. (PR), Dominican Republic | Fabaceae | T | 380 | NA | NA |
| 442 | #Stenogyne angustifolia^ var. #angustifolia^ | None | U.S.A. (HI) | Lamiaceae | E | 73 | NA | NA |
| 443 | #Stenogyne bifida^ | None | U.S.A. (HI) | Lamiaceae | E | 480 | NA | NA |
| 444 | #Stenogyne campanulata^ | None | U.S.A. (HI) | Lamiaceae | E | 464 | NA | NA |
| 445 | #Stenogyne kanehoana^ | None | U.S.A. (HI) | Lamiaceae | E | 466 | NA | NA |
| 446 | #Stephanomeria malheurensis^ | Malheur wire-lettuce | U.S.A. (OR) | Asteraceae | E | 126 | 17.96(a) | NA |
| 447 | #Styrax portoricensis^ | Palo de jazmín | U.S.A. (PR) | Styracaceae | E | 461 | NA | NA |
| 448 | #Styrax texana^ | Texas snowbells | U.S.A. (TX) | Styracaceae | E | 162 | NA | NA |
| 449 | #Suaeda californica^ | Seablite, California | U.S.A. (CA) | Chenopodiaceae | E | 567 | NA | NA |
| 450 | #Swallenia alexandrae^ | Eureka Dune grass | U.S.A. (CA) | Poaceae | E | 39 | NA | NA |
| 451 | #Ternstroemia luquillensis^ | Palo colorado | U.S.A. (PR) | Theaceae | E | 461 | NA | NA |
| 452 | #Ternstroemia subsessilis^ | None | U.S.A. (PR) | Theaceae | E | 461 | NA | NA |
| 453 | #Tetramolopium arenarium^ | None | U.S.A. (HI) | Asteraceae | E | 532 | NA | NA |
| 454 | #Tetramolopium capillare^ | Pamakani | U.S.A. (HI) | Asteraceae | E | 555 | NA | NA |
| 455 | #Tetramolopium filiforme^ | None | U.S.A. (HI) | Asteraceae | E | 448 | NA | NA |
| 456 | #Tetramolopium lepidotum^ ssp. #lepidotum^ | None | U.S.A. (HI) | Asteraceae | E | 448 | NA | NA |
| 457 | #Tetramolopium remyi^ | None | U.S.A. (HI) | Asteraceae | E | 435 | NA | NA |
| 458 | #Tetramolopium rockii^ | None | U.S.A. (HI) | Asteraceae | T | 480 | NA | NA |
| 459 | #Tetraplasandra gymnocarpa^ | `Ohe`ohe | U.S.A. (HI) | Araliaceae | E | 536 | NA | NA |
| 460 | #Thalictrum cooleyi^ | Cooley's meadowrue | U.S.A. (FL, NC) | Ranunculaceae | E | 344 | NA | NA |
| 461 | #Thelypodium stenopetalum^ | Slender-petaled mustard | U.S.A. (CA) | Brassicaceae | E | 158 | NA | NA |
| 462 | #Thymophylla tephroleuca (=Dyssodia t.)^ | Ashy dogweed | U.S.A. (TX) | Asteraceae | E | 152 | NA | NA |
| 463 | #Townsendia aprica^ | Last Chance townsendia | U.S.A. (UT) | Asteraceae | T | 200 | NA | NA |
| 464 | #Trichilia triacantha^ | Bariaco (=guayabacón) | U.S.A. (PR) | Meliaceae | E | 303 | NA | NA |
| 465 | #Trifolium stoloniferum^ | Running buffalo clover | U.S.A. (AR, IL, IN, KS, KY, MO, OH, WV) | Fabaceae | E | 270 | NA | NA |
| 466 | #Trillium persistens^ | Persistent trillium | U.S.A. (GA, SC) | Liliaceae | E | 39 | NA | NA |
| 467 | #Trillium reliquum^ | Relict trillium | U.S.A. (AL, GA, SC) | Liliaceae | E | 306 | NA | NA |
| 468 | #Tuctoria mucronata (=Orcuttia m.)^ | Solano grass | U.S.A. (CA) | Poaceae | E | 44 | NA | NA |
| 469 | #Urera kaalae^ | Opuhe | U.S.A. (HI) | Urticaceae | E | 448 | NA | NA |
| 470 | #Vernonia proctorii^ | None | U.S.A. (PR) | Asteraceae | E | 501 | NA | NA |
| 471 | #Vicia menziesii^ | Hawaiian vetch | U.S.A. (HI) | Fabaceae | E | 39 | NA | NA |
| 472 | #Vigna o-wahuensis^ | None | U.S.A. (HI) | Fabaceae | E | 559 | NA | NA |
| 473 | #Viola chamissoniana ssp. chamissoniana^ | Pamakani | U.S.A. (HI) | Violaceae | E | 448 | NA | NA |
| 474 | #Viola helenae^ | None | U.S.A. (HI) | Violaceae | E | 436 | NA | NA |
| 475 | #Viola lanaiensis^ | None | U.S.A. (HI) | Violaceae | E | 435 | NA | NA |
| 476 | #Warea amplexifolia^ | Wide-leaf warea | U.S.A. (FL) | Brassicaceae | E | 266 | NA | NA |
| 477 | #Warea carteri^ | Carter's mustard | U.S.A. (FL) | Brassicaceae | E | 256 | NA | NA |
| 478 | #Wilkesia hobdyi^ | Dwarf iliau | U.S.A. (HI) | Asteraceae | E | 473 | NA | NA |
| 479 | #Xylosma crenatum^ | None | U.S.A. (HI) | Flacourtiaceae | E | 464 | NA | NA |
| 480 | #Xyris tennesseensis^ | Tennessee yellow-eyed grass | U.S.A. (AL, GA, TN) | Xyridaceae | E | 430 | NA | NA |
| 481 | #Zanthoxylum hawaiiense^ | A`e | U.S.A. (HI) | Rutaceae | E | 532 | NA | NA |
| 482 | #Zanthoxylum thomasianum^ | St. Thomas prickly-ash | U.S.A. (PR, VI) | Rutaceae | E | 213 | NA | NA |
| 483 | #Zizania texana^ | Texas wild-rice | U.S.A. (TX) | Poaceae | E | 39 | 17.96(a) | NA |
| 484 | #Ziziphus celata^ | Florida ziziphus | U.S.A. (FL) | Rhamnaceae | E | 356 | NA | NA |
| 485 | Conifers and Cycads | Conifers and Cycads | | | | | | |
| 486 | #Abies guatemalensis^ | Pinabete or Guatemalan fir | Mexico, Guatemala, Honduras, El Salvador | Pinaceae | T | 84 | NA | NA |
| 487 | #Cupressus abramsiana^ | Santa Cruz cypress | U.S.A. (CA) | Cupressaceae | E | 252 | NA | NA |
| 488 | #Fitzroya cupressoides^ | Chilean false larch (=alerce) | Chile, Argentina | Cupressaceae | T | 79 | NA | NA |
| 489 | #Torreya taxifolia^ | Florida torreya | U.S.A. (FL, GA) | Taxaceae | E | 140 | NA | NA |
| 490 | Ferns and Fern Allies | Ferns and Fern Allies | | | | | | |
| 491 | #Adenophorus periens^ | Fern, pendant kihi | U.S.A. (HI) | Grammitidaceae | E | 559 | NA | NA |
| 492 | #Adiantum vivesii^ | None | U.S.A. (PR) | Adiantaceae | E | 504 | NA | NA |
| 493 | #Asplenium fragile^ var. #insulare^ | None | U.S.A. (HI) | Aspleniaceae | E | 553 | NA | NA |
| 494 | #Asplenium scolopendrium^ var. #americana (=Phyllitis japonica^ ssp. #a., =P. s.^ var. #a)^ | American hart's-tongue fern | U.S.A. (AL, MI, NY, TN), Canada (Ont.) | Aspleniaceae | T | 354 | NA | NA |
| 495 | #Ctenitis squamigera^ | Pauoa | U.S.A. (HI) | Aspleniaceae | E | 553 | NA | NA |
| 496 | #Cyathea dryopteroides^ | Elfin tree fern | U.S.A. (PR) | Cyatheaceae | E | 277 | NA | NA |
| 497 | #Diellia erecta^ | Asplenium-leaved diellia | U.S.A. (HI) | Aspleniaceae | E | 559 | NA | NA |
| 498 | #Diellia falcata^ | None | U.S.A. (HI) | Aspleniaceae | E | 448 | NA | NA |
| 499 | #Diellia pallida^ | None | U.S.A. (HI) | Aspleniaceae | E | 530 | NA | NA |
| 500 | #Diellia unisora^ | None | U.S.A. (HI) | Aspleniaceae | E | 541 | NA | NA |
| 501 | #Diplazium molokaiense^ | None | U.S.A. (HI) | Aspleniaceae | E | 553 | NA | NA |
| 502 | #Elaphoglossum serpens^ | None | U.S.A. (PR) | Lomariopsidaceae | E | 504 | NA | NA |
| 503 | #Huperzia mannii (=Lycopodium m.)^ | Wawa`iole | U.S.A. (HI) | Lycopodiaceae | E | 467 | NA | NA |
| 504 | #Isoetes louisianensis^ | Louisiana quillwort | U.S.A. (LA) | Isoetaceae | E | 482 | NA | NA |
| 505 | #Isoetes melanospora^ | Black-spored quillwort | U.S.A. (GA, SC) | Isoetaceae | E | 302 | NA | NA |
| 506 | #Isoetes tegetiformans^ | Mat-forming quillwort | U.S.A. (GA) | Isoetaceae | E | 302 | NA | NA |
| 507 | #Lycopodium nutans^ | Wawae`iole | U.S.A. (HI) | Lycopodiaceae | E | 536 | NA | NA |
| 508 | #Marsilea villosa^ | `Ihi`ihi | U.S.A. (HI) | Marsileaceae | E | 474 | NA | NA |
| 509 | #Polystichum aleuticum^ | Aleutian shield-fern (=Aleutian holly-fern) | U.S.A. (AK) | Dryopteridaceae | E | 305 | NA | NA |
| 510 | #Polystichum calderonense^ | None | U.S.A. (PR) | Dryopteridaceae | E | 504 | NA | NA |
| 511 | #Pteris lidgatei^ | None | U.S.A. (HI) | Adiantaceae | E | 553 | NA | NA |
| 512 | #Tectaria estremerana^ | None | U.S.A. (PR) | Dryopteridaceae | E | 504 | NA | NA |
| 513 | #Thelypteris inabonensis^ | None | U.S.A. (PR) | Thelypteridaceae | E | 506 | NA | NA |
| 514 | #Thelypteris pilosa^ var. #alabamensis (=Leptogramma p.^ var. #a.)^ | Alabama streak-sorus fern | U.S.A. (AL) | Thelypteridaceae | T | 476 | NA | NA |
| 515 | #Thelypteris verecunda^ | None | U.S.A. (PR) | Thelypteridaceae | E | 506 | NA | NA |
| 516 | #Thelypteris yaucoensis^ | None | U.S.A. (PR) | Thelypteridaceae | E | 506 | NA | NA |
| 517 | Lichens | Lichens | | | | | | |
| 518 | #Cladonia perforata^ | Florida perforate cladonia | U.S.A. (FL) | Cladoniaceae | E | 500 | NA | NA |
| 519 | #Gymnoderma lineare^ | Lichen, rock gnome | U.S.A. (NC,TN) | Cladoniaceae | E | 572 | NA | NA
|
