Allium constrictum |
Allium textile |
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Grand Coulee onion |
prairie onion, textile onion, white wild onion |
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Bulbs | 1–5+, not clustered on stout, primary rhizome, ovoid, 1–1.5 × 0.8–1.4 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats white, cells obscure, quadrate. |
1–3+, not rhizomatous, without basal bulbels, ovoid, 1.2–2.5 × 1–2 cm; outer coats enclosing 1 or more bulbs, gray or brown, reticulate, cells fine-meshed, open, fibrous; inner coats whitish, cells vertically elongate and regular or obscure. |
Leaves | usually persistent, green at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, broadly channeled, falcate, 10–35 cm × 1–3(–5) mm, margins entire. |
persistent, green at anthesis, 2, sheathing; blade solid, ± straight, channeled, semiterete, 10–40 cm × 1–3(–5) mm, margins entire or denticulate. |
Scape | persistent, solitary, erect, solid, terete, enlarged apically but distinctly constricted just proximal to inflorescence, 15–20 cm × 1.5–4 mm. |
persistent, solitary, erect, ± terete, 5–30(–40) cm × 1–3 mm. |
Umbel | persistent, erect, compact, 15–30-flowered, hemispheric to globose, bulbils unknown; spathe bracts persistent, 3, 5–7-veined, ovate, ± equal, apex acute. |
persistent, erect, compact to ± loose, 15–30-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 3, usually 1-veined, ovate, ± equal, apex acuminate. |
Flowers | ± stellate, 7–8 mm; tepals spreading, light pink to rose with prominent green or reddish midribs, narrowly lanceolate, ± equal, becoming papery in fruit, margins entire, apex acuminate; stamens exserted; anthers blue-gray; pollen light blue to gray; ovary crested; processes 6, 2 per lobe, low, rounded, margins entire; style exserted, linear; stigma capitate, unlobed; pedicel 10–20 mm. |
urceolate to campanulate, 5–7 mm; tepals erect, white or rarely pink, with red or reddish brown midribs; outer whorl broadly ovate to lanceolate, unequal, becoming callous-keeled and permanently investing capsule, margins often obscurely toothed apically, apex obtuse to acuminate; inner whorl narrower, margins entire, apex distinctly spreading; stamens included; anthers yellow; pollen yellow; ovary ± conspicuously crested; processes 6, central, distinct or connate in pairs across septa, ± erect, rounded, to 1 mm, margins entire, becoming variously developed or obsolete in fruit; style linear, equaling filaments; stigma capitate, unlobed or obscurely lobed; pedicel 5–20 mm. |
Seed | coat shining; cells smooth. |
coat shining; cells ± smooth, without central papillae. |
2n | = 14. |
= 14, 28. |
Allium constrictum |
Allium textile |
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Phenology | Flowering May–Jul. | Flowering May–Jun. |
Habitat | Shallow, lithosolic soils, often dry and sandy | Dry plains and hills |
Elevation | 300–500 m (1000–1600 ft) | 300–2400 m (1000–7900 ft) |
Distribution |
WA
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CO; IA; ID; KS; MN; MT; ND; NE; NM; NV; SD; UT; WA; WY; AB; MB; SK
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Discussion | Of conservation concern. Allium constrictum is known only from Douglas, Grant, and Lincoln counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 26. | FNA vol. 26, p. 243. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Synonyms | A. douglasii var. constrictum | A. aridum, A. reticulatum, A. reticulatum var. playanum |
Name authority | (Ownbey & Mingrone) P. M. Peterson: Syst. Bot. 13: 211. (1988) | A. Nelson & J. F. Macbride: Bot. Gaz. 56: 470. (1913) |
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