Skip to main content

Asteraceae

Year
1987
Citation

U.S. Fish and Wildlife Service (USFWS). 1987. Final rule to determine Cirsium vinaceum (Sacramento Mountains thistle) to be a threatened species. Federal Register 52(115): 22933-22936.

Reference Code
N87OLW01HQUS
Year
1969
Citation

Heiser, C.B., Jr., with D.M. Smith, S.B. Clevenger, and W.C. Martin, Jr. 1969. The North American sunflowers (Helianthus). Memoirs of the Torrey Botanical Club 22(3). 218 pp.

Reference Code
A69HEI01HQUS