Asclepias oreophila Nicholas ex Hilliard & B.L.Burtt

Herba perennis; caules 5-23 cm alti, solitarii vel duo e caudice, erecti, parce pubescentes. Folia c. 25-90 x 1.5-7 mm, ascendentia, linearia vel anguste elliptica, acuta, ad basin anguste cuneata, subsessilia, marginibus revolutis, vel supra hispidula intra pilis ad costam restrictis vel omnino glabra. Inflorescentiae umbelliformes, 3-5-florae, pedunculo foliis breviore, saepe solitariae terminales interdum altera ex axilla folii superioris vel ramulum brevem terminante. Flores 8-12 x 13-18 mm. Calyx lobis c. 3-4 x 1 mm lanceolatis extra hispidis. Corolla catilliformis, fere ad basin divisa; lobi 8-11 x 5.5-7 mm, late elliptici, intus glabri, extra tenuiter vel dense pubescentes, margine ciliati, intus albi vel eburnei, extra albi vel ochroleuci vel griseo-brunnei roseo-violaceo-vel purpureo-notati. Coronae lobi 3.2-4.5 x 2-3.5 mm, virides, purpureo-brunneo-vel violaceo-maculati, complicato-cucullati, naviculiformes, sinu saccato, carina sordide violacea brunnea vel viridiuscula, appendicibus proximalibus luteo-viridibus uno e dentibus duobus in cavitatem inflexo. Columna staminalis 4-5 mm; appendices antherae albi, ovati, 1-1.3 x 1.2-1.7 mm, supra gynostegio albo vel pallide viridi inflexi; fissura alaris 1.2-1.5 mm longa. Pollinia triangularia, c. 0.76-0.88 x 0.44-0.52 mm.