Family:Composite or Sunflower (Compositae)
Size: To 3 in. wide
Other names: Santa Fe Thistle
Notes: Very wooly leaves, deeply lobed with yellowish spines on edge of leaves. Wooly haired stem. 17 species of Cirsium in Arizona.
This plant is found on the Appleton-Whittell Research Ranch Working Check list of flora.
Entries for Yellowspine Thistle in the CalPhotos section of the Berkeley Digital Library Project can be seen.