Allium geyeri |
Allium aaseae |
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Geyer's onion |
Aase's onion, South Idaho onion |
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Bulbs | 2–10+, not rhizomatous, ovoid or more elongate, 1–2.5 × 0.8–2 cm; outer coats enclosing 1 or more bulbs, gray or brown, reticulate, cells rather coarse-meshed, open, fibrous; inner coats whitish, cells vertically elongate and regular or obscure. |
2–10+, not clustered on stout, primary rhizome, ovoid, 1–2 × 0.8–1.5 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, with or without obscure reticulations, cells isodiametric or transversely elongate, ± contorted, without fibers; inner coats white, pink, or red, cells obscure, ± quadrate. |
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Leaves | persistent, usually green at anthesis, usually 3–5, sheathing less than 1/4 scape; blade solid, ± straight, flat, channeled, (6–)12–30 cm × 1–3(–5) mm, margins entire or denticulate. |
usually deciduous with scape, green at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat to ± terete, channeled, 7–25 cm × 1–4 mm, margins entire or minutely denticulate. |
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Scape | persistent, solitary, erect, terete or somewhat 2-angled, 10–50 cm × 1–3 mm. |
usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, slightly flattened, with or without narrow, sometimes crenulate-denticulate wings, 5–12 cm × 1–2 mm. |
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Umbel | persistent, erect, compact, 10–25-flowered, hemispheric to globose, not producing bulbils, or 0–5-flowered, largely replaced by ovoid, acuminate bulbils; spathe bracts persistent, 2–3, mostly 1-veined, ovate to lanceolate, ± equal, apex acuminate, beakless. |
persistent, erect, compact, 5–25-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2–3, 8–11-veined, ovate, ± equal, apex obtuse to acuminate. |
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Flowers | urceolate-campanulate, (4–)6–8(–10) mm; tepals erect or spreading, pink to white, ovate to lanceolate, ± equal, not withering in fruit and permanently investing fruit, or withering if fruit not produced, midribs papillose, becoming callous-keeled, margins often obscurely toothed, apex obtuse to acuminate; stamens included; anthers yellow; pollen yellow; ovary when present, inconspicuously crested; processes 6, central, low, distinct or connate in pairs across septa, ± erect, rounded, margins entire, becoming variously developed or obsolete in fruit; style linear, ± equaling stamens; stigma capitate, unlobed or obscurely lobed; pedicel becoming rigid and stiffly spreading in fruit, 8–13 mm. |
campanulate, 6–9 mm; tepals erect, bright pink fading to white with dark midribs, rarely white, oblong to lanceolate, ± equal, becoming papery in fruit, margins obscurely to distinctly serrulate-denticulate, apex obtuse to acuminate; stamens included; anthers yellow; pollen yellow; ovary crestless; style included, linear; stigma capitate, scarcely thickened, unlobed; pedicel 3–10 mm. |
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Seed | coat shining; cells each with minute, central papilla. |
coat shining; cells smooth. |
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2n | = 14. |
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Allium geyeri |
Allium aaseae |
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Phenology | Flowering Apr–May. | |||||
Habitat | Coarse, sandy soil and gravelly river benches | |||||
Elevation | 800–1100 m (2600–3600 ft) | |||||
Distribution |
w North America
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ID
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Allium aaseae is known only from Ada and southern Gem counties and Rebecca Sand Hill, Washington County, and is considered of conservation concern by the Idaho Department of Fish and Game. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 26, p. 237. | FNA vol. 26, p. 268. | ||||
Parent taxa | Liliaceae > Allium | Liliaceae > Allium | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | S. Watson: Proc. Amer. Acad. Arts 14: 227. (1879) | Ownbey: Res. Stud. State Coll. Wash. 18: 19, fig. 18. (1950) | ||||
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