Marc Coles-Ritchie:
Cirsium arizonicum (Arizona thistle)
Marc Coles-Ritchie:
Cirsium arizonicum (Arizona thistle)
Marc Coles-Ritchie:
Cirsium arizonicum (Arizona thistle)
Marc Coles-Ritchie:
Cirsium arizonicum (Arizona thistle)
Marc Coles-Ritchie:
Cirsium arizonicum (Arizona thistle)
Marc Coles-Ritchie:
Cirsium arizonicum (Arizona thistle)
Marc Coles-Ritchie:
Cirsium calcareum (Cainville thistle)
Marc Coles-Ritchie:
Cirsium calcareum (Cainville thistle)
Marc Coles-Ritchie:
Cirsium clavatum (Fish Lake thistle)
Marc Coles-Ritchie:
Cirsium clavatum (Fish Lake thistle)
Marc Coles-Ritchie:
Cirsium eatonii (Eaton's Thistle)
Marc Coles-Ritchie:
Cirsium pulchellum (Cainville thistle)
Marc Coles-Ritchie:
Cirsium pulchellum (Cainville thistle)
Marc Coles-Ritchie:
Cirsium rydbergii (Rydberg's thistle)
Marc Coles-Ritchie:
Cirsium rydbergii (Rydberg's thistle)
Marc Coles-Ritchie:
Cirsium rydbergii (Rydberg's thistle)
Marc Coles-Ritchie:
Cirsium rydbergii (Rydberg's thistle)
Marc Coles-Ritchie:
Cirsium rydbergii (Rydberg's thistle)
Marc Coles-Ritchie:
Cirsium scopulorum (alpine thistle)?
Marc Coles-Ritchie:
Cirsium sp. (thistle)
Marc Coles-Ritchie:
Cirsium sp. (thistle)
Marc Coles-Ritchie:
Cirsium sp. (thistle)
Marc Coles-Ritchie:
Cirsium sp. (thistle) and manzanita
Marc Coles-Ritchie:
Cirsium tioganum (dinnerplate thistle)
Marc Coles-Ritchie:
Cirsium tioganum (dinnerplate thistle)
Marc Coles-Ritchie:
Cirsium tracyi (Tracy's thistle)
Marc Coles-Ritchie:
Cirsium tracyi (Tracy's thistle)
Marc Coles-Ritchie:
Cirsium tukuhnikivatzicum (La Sal thistle)
Marc Coles-Ritchie:
Cirsium tukuhnikivatzicum (La Sal thistle)
Marc Coles-Ritchie:
Cirsium tukuhnikivatzicum (La Sal thistle)
