As classified in WFO snapshot
May 2019
Warning: older classification
species
Cirsium occidentale
This species name was first published in Fl. W. Calif. : 509 (1901)
At the time of this classification snapshot, this species name was accepted by WFO (placed as the accepted name of a taxon). Its description and other taxonomic data can be found on World Flora Online, id: wfo-0000074921.