Diagn. Pl. Nov. Mexic., 55. 1880.
Leaf blade dull green, to 1(–2) mm wide. Spathe 2.1–3.1 cm. Flowers erect to slightly inclined; perianth yellow, funnelform, 2.1–2.8 cm; perianth tube green, 0.2–0.6 cm, increasing in diam., no more than 1/4 perianth length, ca. 1/2 (1/4–3/4) filament length, no more than 1/4 spathe length; tepals rarely reflexed; stamens diverging, in 2 distinctly unequal sets; filaments filiform, 0.7–1.1 cm; anthers in 2 nonoverlapping sets, 3–6 mm; style longer than perianth tube; stigma 3-fid, usually among anthers; pedicel 0.7–1.5 cm, shorter than spathe. 2n = 48.
Phenology: Flowering late spring–summer (May–Aug).
Habitat: Sandy, gravelly, calcareous, alkaline soils in highlands
Elevation: 40–2400 m
Ariz., N.Mex., Tex., Mexico.