Porophyllum ruderale subsp. macrocephalum (DC.) R.R. Johnson
Asteraceae
Wendy C. Hodgson
20756
2005-10-04
D.Z. Damrel
USA, Arizona, Pima County, West bank (east-facing) of a drainage in Bear Canyon, Santa Catalina Mountains.
32.310667 -110.799467
32d 18.64m N; 110d 47.968m W
830 metros
2739ft.
Below Arizona Uplands Sonoran Desertscrub, in a small mesquite-lined riparian region with a large sward of Fountaingrass in the middle of the canyon drainage