Allium brevistylum |
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short-style onion |
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Bulbs | 2–4, terminating thick, iris-like rhizome, elongate, 2–3 × 0.6–1 cm; outer coats enclosing single bulb, grayish or brownish, membranous, minutely striate, cells in parallel vertical rows, narrow, elongate, not fibrous-reticulate, fibers persistent, parallel, few, coarse; inner coats whitish, cells narrowly vertically elongate. |
Leaves | persistent, green at anthesis, 2–5, basally sheathing, sheaths not extending much above soil level; blade solid, flat, 10–40 cm × 2–8 mm, margins entire. |
Scape | persistent, solitary, erect, solid, flattened and narrowly winged distally, 20–60 cm × 1.5–4 mm. |
Umbel | persistent, erect, loose, 7–20-flowered, subhemispheric, bulbils unknown; spathe bracts persistent, 2, 3–5-veined, ovate, ± equal, apex acute. |
Flowers | narrowly urceolate, 10–13 mm; tepals erect, pink, lanceolate, ± equal, withering in fruit, margins entire, apex acuminate, midribs somewhat thickened; stamens included, ca. 1/2 as long as tepals; anthers yellow; pollen light yellow; ovary crestless; style linear, equaling stamens; stigma capitate, distinctly 3-lobed; pedicel 8–35 mm, elongating and becoming stout and curved in fruit. |
Seed | coat dull or shining; cells each with minute, central papilla, or obscurely and minutely roughened. |
2n | = 14. |
Allium brevistylum |
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Phenology | Flowering Jun–Aug. |
Habitat | Swampy meadows and along streams, rarely on wooded slopes |
Elevation | 2200–3400 m (7200–11200 ft) |
Distribution |
CO; ID; MT; NM; UT; WY
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Discussion | Allium brevistylum is found only in the Rocky Mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 26, p. 246. |
Parent taxa | |
Sibling taxa | |
Name authority | S. Watson: Botany (Fortieth Parallel), 350. (1871) |
Web links |