TALL BUTTERWEED
SENECIO SERRA  ASTERCACEA COMPOSITAE (SUNFLOWER)

ALSO CALLED: BUTTERWEED GROUNDSEL, SAW GROUNDSEL, AND TALL RAGWORT

MANUEL OF THE FLOWERING PLANTS OF CALIFORNIA  P. 1150

http://www.fs.fed.us/r1/clearwater/LewisClark/lewis_clark_plants/LC_photos/forb_yellow/seneserr.htm

http://www.larkspurbooks.com/Comp6.html