Allium columbianum |
Allium tolmiei |
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Columbia onion, Columbian onion |
Tolmie's onion |
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Bulbs | 1–5+, not clustered on stout, primary rhizome, ovoid, 1–1.5 × 0.8–1.4 cm; outer bulb coats brownish or grayish, enclosing 1 or more bulbs, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats white to pink, cells obscure, ± quadrate. |
1–10+, not clustered on stout primary rhizome, not forming rhizomes, renewal bulbs formed within coats of parent bulb, or borne terminally on rhizomes outside coats of parent bulb, parent bulb disappearing by anthesis except for still-functional roots and shriveled bulb coat, ovoid or oblique, 0.6–2 × 1–2.5 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 white to pink, cells obscure, quadrate, or not visible. |
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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 × (2–)5–8 mm, margins entire. |
forming abcission layer at soil surface and deciduous or persistent with scape after seeds mature, also frequently breaking at soil surface after pressing, withering at tip at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, ± falcate, 10–40 cm × 1–10 mm, margins entire. |
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Scape | persistent, solitary, erect, solid, terete, enlarged proximal to inflorescence, (10–)20–30(–40) cm × 1.5–4 mm. |
deciduous or persistent, solitary, erect, solid, compressed to strongly flattened and winged or not, 5–40 cm × 1–5 mm. |
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Umbel | persistent, erect, compact, 25–50-flowered, hemispheric to globose, bulbils unknown; spathe bracts persistent, 3, 5–7-veined, ovate, ± equal, apex acute. |
persistent, erect, compact to ± loose, 10–50-flowered, globose to hemispheric, bulbils unknown; spathe bracts persistent, 2–3, 8–17-veined, ovate to lanceolate, ± equal, apex acuminate. |
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Flowers | ± stellate, (6–)7–8(–10) mm; tepals spreading, light pink to purple with prominent green midribs, narrowly lanceolate, ± equal, becoming papery in fruit, margins entire, apex acuminate; stamens equaling or longer than tepals; anthers blue-gray; pollen light blue to gray; ovary crested; processes 6, 2 per lobe, low, rounded, margins entire; style exserted, linear; stigma capitate, scarcely thickened, unlobed; pedicel 10–20 mm. |
campanulate to ± stellate, 6–12 mm; tepals ± erect, almost white to pink, with prominent, darker midribs, lanceolate, ± equal, becoming rigid, spreading, carinate in fruit, margins entire, apex acute to acuminate, involute at tip; stamens included to ± equaling tepals or exserted; anthers purple to yellow; pollen yellow; ovary crestless or obscurely to prominently crested; processes 3 or 6, central, low, rounded to ± prominent, triangular, margins entire; style linear, ± equaling stamens; stigma capitate, unlobed or obscurely lobed; pedicel 5–25 mm. |
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Seed | coat shining; cells smooth. |
coat dull; cells smooth. |
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2n | = 14. |
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Allium columbianum |
Allium tolmiei |
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Phenology | Flowering May–Jul. | |||||
Habitat | Winter-wet, shallow soils on rock outcrops, or wet meadows | |||||
Elevation | 300–1100 m (1000–3600 ft) | |||||
Distribution |
ID; MT; WA
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w United States
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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. | FNA vol. 26, p. 272. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | A. douglasii var. columbianum | |||||
Name authority | (Ownbey & Mingrone) P. M. Peterson: Syst. Bot. 13: 211. (1988) | Baker: Bot. Mag. 32: under plate 6227. (1876) | ||||
Web links |