Boletus Fries
Syst. Mycol. 1: 385. 1821.

Principle characteristics of the genus Boletus:

• Hymenophore pored
• Spore print typically olive-brown

Keys and descriptions of the genus Boletus:

• Harry D. Thiers: Boletes of California
• MushroomExpert.com: The Genus Boletus
• Thiers, H.D. (1975). California Mushrooms--A Field Guide to the Boletes. Hafner Press: New York, NY.
• Bessette, A.E., Roody, W.C. & Bessette, A.R. (2000). North American Boletes: A Color Guide to the Fleshy Pored Mushrooms. Syracuse University Press: Syracuse, NY.
• Both, E.E. (1993). The Boletes of North America: A Compendium. Buffalo Museum of Science: Buffalo, NY.
• Snell, W.H. & Dick, E.A. (1970). The Boleti of Northeastern North America. J. Cramer: Lehre.

Boletus species known to occur in California:

1. Boletus abieticola
2. Boletus aereus
3. Boletus amygdalinus
4. Boletus appendiculatus
5. Boletus calopus var. frustosus
6. Boletus chrysenteron
7. Boletus citriniporus
8. Boletus coccyginus
9. Boletus dryophilus
10. Boletus edulis
11. Boletus fibrillosus
12. Boletus flaviporus
13. Boletus fragans
14. Boletus haemitinus
15. Boletus mendocinensis
16. Boletus orovillus
17. Boletus pinophilus
18. Boletus pulcherrimus
19. Boletus pulverulentus
20. Boletus regius
21. Boletus rubripes
22. Boletus satanas
23. Boletus smithii
24. Boletus spadiceus
25. Boletus subtomentosus
26. Boletus tomentipes
27. Boletus truncatus
28. Boletus zelleri