Brittle Spineflower: Chorizanthe brevicornu var. brevicornu (Synonym: Chorizanthe brevicornu ssp. brevicornu)
Wrinkled Spineflower: Chorizanthe corrugata (Synonym: Acanthogonum corrugatum)
Devil's Spineflower, Rigid Spiny Herb: Chorizanthe rigida (Synonym: Acanthogonum rigidum)