Cirsium anartiolepis Petr. (original description)
Cirsium andersonii (A.Gray) Petr. (original description)
Cirsium arizonicum (A.Gray) Petr. (original description)
Cirsium bernardinum (Greene) Petr. accepted as Cirsium occidentale var. californicum (A.Gray) D.J.Keil & C.E.Turner (original description)
Cirsium horridulum subsp. chrismarii (Klatt) Petr. accepted as Cirsium horridulum Michx. (original description)
Cirsium jorullense subsp. enjorullense Petr. accepted as Cirsium jorullense (Kunth) Spreng. (original description)
Cirsium jorullense subsp. lanosum Petr. accepted as Cirsium jorullense (Kunth) Spreng. (original description)
Cirsium limophilum Petr. (original description)
Cirsium mohavense (Greene) Petr. (original description)
Cirsium occidentale subsp. acrolepis Petr. accepted as Cirsium acrolepis (Petr.) G.B.Ownbey (original description)
Cirsium occidentale subsp. candidissimum (Greene) Petr. accepted as Cirsium occidentale var. candidissimum (Greene) J.F.Macbr. (original description)
Cirsium odoratum (Muhl. ex Barton) Petr. accepted as Cirsium pumilum var. pumilum (original description)
Cirsium oxylepis Petr. (original description)
Cirsium parryi (A.Gray) Petr. (original description)
Cirsium rothrockii (A.Gray) Petr. accepted as Cirsium arizonicum var. rothrockii (A.Gray) D.J.Keil (original description)
Cirsium wheeleri (A.Gray) Petr. (original description)