Allium brevistylum |
Allium fibrillum |
|
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short-style onion |
Blue Mountain onion, Cuddy Mountain onion, fringe onion |
|
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. |
1–5+, without cluster of basal bulbels, not clustered on stout primary rhizome, ± globose, 0.5–1.2 × 0.5–1 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, reticulate; cells very fine, often obscure, narrow, ± transversely elongate, intricately contorted, without fibers; inner coats white to pink, cells obscure, transversely elongate, intricately contorted. |
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. |
usually persistent, withering from tip by anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, ± falcate, linear, channeled, 7–24 cm × 0.5–3 mm, margins entire. |
Scape | persistent, solitary, erect, solid, flattened and narrowly winged distally, 20–60 cm × 1.5–4 mm. |
persistent, solitary, erect, solid, terete or slightly flattened to very narrowly winged, 3–15 cm × 0.5–2 mm. |
Umbel | persistent, erect, loose, 7–20-flowered, subhemispheric, bulbils unknown; spathe bracts persistent, 2, 3–5-veined, ovate, ± equal, apex acute. |
persistent, erect, compact, 10–20-flowered, hemispheric to globose, bulbils unknown; spathe bracts persistent, 2, 4–6-veined, ovate, ± equal, apex acuminate. |
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. |
campanulate, 5–8 mm; tepals erect, white with prominent greenish or pink midribs, lanceolate, ± equal, becoming papery in fruit, margins entire, apex obtuse to acuminate, ± involute at tip; stamens included; anthers yellow; pollen yellow; ovary crestless or obscurely crested; processes 3, low, rounded, margins entire; style linear, equaling stamens; stigma capitate, unlobed; pedicel 3–10 mm. |
Seed | coat dull or shining; cells each with minute, central papilla, or obscurely and minutely roughened. |
coat dull or shining; cells smooth. |
2n | = 14. |
= 14. |
Allium brevistylum |
Allium fibrillum |
|
Phenology | Flowering Jun–Aug. | Flowering May–Jul. |
Habitat | Swampy meadows and along streams, rarely on wooded slopes | Moist, shallow soils |
Elevation | 2200–3400 m (7200–11200 ft) | 300–2600 m (1000–8500 ft) |
Distribution |
CO; ID; MT; NM; UT; WY
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ID; MT; OR; WA
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Discussion | Allium brevistylum is found only in the Rocky Mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Allium fibrillum closely resembles A. madidum but does not have a cluster of basal bulbels. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 26, p. 246. | FNA vol. 26, p. 266. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. collinum | |
Name authority | S. Watson: Botany (Fortieth Parallel), 350. (1871) | M. E. Jones ex Abrams: in L. Abrams and R. S. Ferris, Ill. Fl. Pacific States 1: 393. (1923) |
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