Allium nevadense
Gerald D. Carr

Flora of Oregon

Bulbs 1–3, with 0–2 stalked, basal bulbils, ovoid; outer coats enclosing 1 or more bulbs, membranous, usually prominently cellular-reticulate, cells more or less transversely elongate, intricately contorted, without fibers.

Leaves persistent, 1; blades solid, terete, 10–20 cm × 1–3 mm.

Scapes persistent, solitary, erect, more or less solid, terete, 5–15 cm × 1–2.5 mm.

Umbels persistent, erect, compact, 5–25-flowered, hemispheric; pedicels 8–16 mm; spathe bracts 2–3.

Flowers 7–12 mm; tepals spreading, lanceolate to ovate, more or less equal, white or pinkish white with dark pink included; ovary crested with 6 prominent processes; stigma scarcely thickened, unlobed.

2n=14, 28.

Rocky soils in shrub-steppe, seasonally moist clay soils in scablands. Flowering May–Jun. 800–1600 m. BR, Owy. CA, ID, NV; east to CO, southeast to AZ. Native.

Flora of North America

as described under Allium nevadense

Bulbs 1-3, not clustered on stout, primary rhizome, with 0-2 stalked, basal bulbels, ovoid, 1-2 × 0.8-1.5 cm; outer coats enclosing 1 or more bulbs, brown, membranous, usually prominently cellular-reticulate, cells ± transversely elongate, intricately contorted, without fibers; inner coats white or pinkish, cells elongate, intricately contorted. Leaves persistent, 1, basally sheathing, sheath not extending much above soil surface; blade solid, terete, 10-20 cm × 1-3 mm. Scape persistent, solitary, erect, ± solid, terete, 5-15 cm × 1-2.5 mm. Umbel persistent, erect, compact, 5-25-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2-3, 3-7-veined, ovate to lanceolate, ± equal, apex acuminate. Flowers stellate, 7-12 mm; tepals spreading, white or pinkish white with dark pink midveins, lanceolate to ovate, ± equal, becoming papery in fruit, margins entire, apex acute to acuminate; stamens included; anthers purple; pollen yellow; ovary crested; processes 6, prominent, ± triangular, margins entire to notched or shallowly toothed; style linear, equaling stamens; stigma capitate, scarcely thickened, unlobed; pedicel 8-16 mm. Seed coat dull; cells minutely roughened. 2n = 14, 28.Flowering Apr--Jun. Sandy, rocky, or occasionally clay soils on desert plains and hillsides; 1400--1700 m; Ariz., Calif., Colo., Idaho, Nev., Oreg., Utah.

Photo images

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Herbarium specimens

https://botanydb.colorado.edu/COLO_V/01846/01846427_tn.jpg
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