Allium brevistylum |
Allium siskiyouense |
|
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short-style onion |
Siskiyou 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, not clustered on stout primary rhizome, increase bulbs absent or ± equaling parent bulbs, never appearing as basal cluster, rhizomes absent, ovoid, 0.8–2 × 0.8–2 cm; outer coats enclosing renewal bulbs, grayish to brown, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats pink to red, cells obscure, ± quadrate, or not visible. |
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 deciduous with scape, withering from tip at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, falcate, 8–18 cm × 3–5 mm, margins entire. |
Scape | persistent, solitary, erect, solid, flattened and narrowly winged distally, 20–60 cm × 1.5–4 mm. |
usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, flattened, winged distally, wing margins commonly minutely serrulate proximal to umbel, 3–8 cm × 1–4 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, 10–35-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 8–10-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. |
conic to campanulate, 8–11 mm; tepals erect, pink, usually with darker pink midveins, lanceolate to elliptic, ± equal, becoming membranous and rigid in fruit, outer margins entire, inner margins usually minutely denticulate distally, apex obtuse, margins becoming ± involute, appearing acuminate in age; stamens included; anthers yellow to light purple; pollen yellow; ovary crested; processes 3, central, 2-lobed, minute, margins entire; style linear, equaling stamens; stigma capitate, scarcely thickened, unlobed; pedicel 5–16 mm. |
Seed | coat dull or shining; cells each with minute, central papilla, or obscurely and minutely roughened. |
coat shining; cells smooth. |
2n | = 14. |
= 14. |
Allium brevistylum |
Allium siskiyouense |
|
Phenology | Flowering Jun–Aug. | Flowering late Apr–Jun. |
Habitat | Swampy meadows and along streams, rarely on wooded slopes | Heavy, rocky, clay soils, including serpentine |
Elevation | 2200–3400 m (7200–11200 ft) | 900–2500 m (3000–8200 ft) |
Distribution |
CO; ID; MT; NM; UT; WY
|
CA; OR
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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 siskiyouense is known only from the Siskiyou Mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 26, p. 246. | FNA vol. 26, p. 275. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. falcifolium var. demissum | |
Name authority | S. Watson: Botany (Fortieth Parallel), 350. (1871) | Ownbey ex Traub: Pl. Life 28: 63. (1972) |
Web links |