Stenopadus crassifolius Blake, Bull. Torrey Club 58:493. 1932.
TYPE: Central Camp at 5000 feet altitude, Cerro Duida, Amazonas, Venezuela, Tate 1014 (holotype NY). In addition, known from Duida by Tate 415 and Steyermark 58354; from Cerro Huachamacari by Maguire, Cowan & Wurdack 30049, 30069, 30115, 30243, 30291; and from Cerro Parii by Cowan & Wurdack 31102, 3U62.
Frequent and generally distributed on breaks, escarpments and margins of thickets at 1500 m altitude or higher; the higher sandstone mountains of Terr. Amazonas, south of the Rib Ventuari.