Family: Nightshade (or potato) (Solanaceae)
Size: To 1 in. wide
Other names: Texas thistle, Colorado bur, Mexican thistle
Notes: 15 species of Solanum in Arizona.
Photos of this plant may be seen on the CalPhoto plant website.
This plant is found on the Appleton-Whittell Research Ranch Working Check list of flora.
Buffalobur entry in the online edition of An Illustrated Guide to Arizona Weeds, Kittie F. Parker, University of Arizona Press.