Sul Ross University, A. Michael Powell Herbarium (SRSC)
00007952
Echinocereus viridiflorus var. canus A.M.Powell & Weedin
Cactaceae
unknown (s.d.)
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Jean E. Hardy
736
1994-11-12
12 Nov 1994
USA, Texas, Presidio, The Solitario. Righthand Shutup
29° 27.36N, 103° 50.57W
1341 meters
ca. 4400'
From Tesnus Formation on SW-facing slope above drainage into Righthand Shutup.
White-spined variety of the green-flowered cactus. Three specimens of population show stages of hairiness prominent in juvenile stage and diminishing with age.