Allium atrorubens |
Allium haematochiton |
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dark red onion, red onion |
red skinned onion, redskin onion |
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Bulbs | 1–3, not clustered on primary rhizome, with 0–2 stalked basal bulbels, ovoid to globose, 1–1.6 × 0.8–1.4 cm; outer coats enclosing 1 or more bulbs, brown, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats pink or white, cells obscure, quadrate. |
2–3+, usually clustered, short-rhizomatous at base, rhizome not stout or iris-like, oblong, 2–3 × 1–1.5 cm; outer coats enclosing single bulb, ± reddish brown, membranous, striations fine, cells narrow, elongate, vertical; inner coats deep red to white, finely striate, cells narrow, vertically elongate. |
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Leaves | persistent, 1, basally sheathing, sheath not extending much above soil level; blade solid, terete, 8–22 cm × 1–2.5 mm. |
persistent, green at anthesis, 3–6, basally sheathing, sheaths not extending much above soil level; blade solid, terete, 3-angled, 15–30 cm × 1–4 mm, margins entire. |
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Scape | persistent, solitary, erect, solid, terete, 5–17 cm × 1–3 mm. |
persistent, 1–2, clustered, erect, solid, slightly compressed, 10–40 cm × 1–3 mm. |
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Umbel | persistent, erect, ± compact, 5–50-flowered, hemispheric to globose, bulbils unknown; spathe bracts persistent, (2–)3, 3–6-veined, ovate to lanceolate, ± equal, apex acuminate. |
persistent, erect, compact, 10–30-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2–4, 2–3-veined, ovate-lanceolate, ± equal, apex obtuse. |
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Flowers | campanulate, 8–12 mm; tepals erect, pale pink to deep reddish purple, rarely white, lanceolate to ovate, ± equal or inner longer and narrower than outer, becoming rigid and ± keeled in fruit, margins entire, apex acute to acuminate; stamens included; anthers purple; pollen white or light yellow; ovary crested; processes 6, prominent, ± triangular, margins entire to notched or shallowly toothed; style linear, equaling stamens; stigma obscurely capitate, scarcely thickened, unlobed; pedicel 10–22 mm. |
campanulate, 6–8 mm; tepals erect, white to rose, with darker midvein, broadly ovate to lance-ovate, ± equal, becoming rigid and permanently investing capsule, margins entire, apex acute; stamens included; anthers white; pollen white to dark gray; ovary crested; processes 6, rounded, short, densely papillose; style linear, equaling stamens; stigma capitate, scarcely thickened, unlobed; pedicel 1–2 cm. |
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Seed | coat dull or shining; cells minutely roughened. |
coat dull; cells minutely roughened. |
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2n | = 14. |
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Allium atrorubens |
Allium haematochiton |
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Phenology | Flowering Mar–May. | |||||
Habitat | Dry slopes and ridges of clay or stony soil | |||||
Elevation | 50–800 m (200–2600 ft) | |||||
Distribution |
Intermountain w United States
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CA; Mexico (Baja California)
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 26, p. 248. | FNA vol. 26, p. 246. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | A. marvinii | |||||
Name authority | S. Watson: Botany (Fortieth Parallel), 352, plate 38, figs. 4, 5. (1871) | S. Watson: Proc. Amer. Acad. Arts 14: 227. (1879) | ||||
Web links |