in R. Sweet, Brit. Fl. Gard., ser. 2, 4: plate 328. 1836.
Leaf blade glaucous-green, to 8 mm wide. Spathe (3–)4–5 cm. Flowers erect; perianth white, sometimes flushed pink abaxially, more so with age, broadly funnelform, 6–9 cm; perianth tube white to green, 3–4(–4.7) cm, diam. primarily uniform, ca. 1/2 perianth length, more than 15 times filament length, equaling (3/4–11/4) spathe length; tepals rarely reflexed; stamens fasciculate, distinctly subequal; filaments subulate, 0.1–0.2 cm, apex acute; anthers 5–8 mm; style notably shorter than perianth tube; stigma 3-fid, included in perianth tube; pedicel (0.2–)0.5–2(–3.3) cm, shorter than spathe. 2n = 48, 72.
Phenology: Flowering mid spring–mid summer (Mar–Aug).
Habitat: Sandy/rocky, usually calcareous soils
Elevation: 0–900 m
Fla., La., Tex., ne Mexico.
Specimens of Zephyranthes drummondii with rare biflowered inflorescences were collected by B. C. Tharp in 1939 and 1946 in Austin, Texas. The species has naturalized in Florida.