Taxa: Cirsium arizonicum, Cirsium arizonicum var. arizonicum (Cnicus arizonicus), Cirsium arizonicum var. nidulum (Cirsium nidulum), Cirsium arizonicum var. bipinnatum (Cirsium calcareum, Cirsium pulchellum ssp. bipinnatum, Carduus pulchellus, Carduus truncatus, Cirsium bipinnatum, Cirsium pulchellum, Cni
... (show all)cus calcareus, Cirsium calcareum var. bipinnatum, Cirsium calcareum var. pulchellum, Cirsium pulchellum var. glabrescens), Cirsium arizonicum var. rothrockii (Cirsium rothrockii, Cirsium pulchellum ssp. diffusum, Cirsium diffusum), Cirsium arizonicum var. chellyense, Cirsium arizonicum var. tenuisectum