Storage roots enlarged 1–2 cm from the corm, 3–4 cm long. Basal leaves narrowly linear, attenuate, 23–53 cm long, 1–5(–7) mm wide, margin denticulate to serrulate. Scapes glabrous or scabrescent toward the base, 30–90 cm high, bearing 0–4 branches. Cauline leaves (2–)3–5(–6), long attenuate, lower to 17.5 cm long. Flowers yellow, cernuous-declinate. Tepals strongly reflexed, (6.5–)8–13 mm long, inner elliptic, 3.5–5 mm wide, outer narrowly elliptic, 2–2.5 mm wide. Filaments scaled, linear, 4–6.5 mm long, insertion dorsal in a pocket. Anthers free, 2.5–3.25 mm long. not versatile, dehiscence lateral. Ovaries 1.5–3 mm long. Capsule (only one seen) 6.5 mm long, 5 mm wide.
It is distinguished by the long-attnuate leaves, both basal and cauline, smallish, cernuous-declinate flowers with relatively narrow and strongly reflexed tepals, and filaments that are inserted in a pocket, which forces the anthers to extend along the ame axi as the filament . The narrow. trongly reflexed tepals and non-versatile anthers distinguish it from E. favescens (Schultes & Schultes f.) Cruden, a common species of desert grasslands and conifer forests of intrior central and northern Mexico.
along the Durango-Sinaloa border.
Echeandia attenuata is known only from seepage areas between 2000 and 2200 m.