Allium nevii |
Allium bisceptrum |
|
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Nevius' garlic, Nevius' onion |
twincrest onion |
|
Bulbs | 1–5+, not clustered on stout, primary rhizome, ovoid, 1–2 × 1–2 cm; outer coats enclosing 1 or more bulbs, light brown, membranous, ± reticulate, cells quadrate to polygonal, vertically oblong, without fibers; inner coats white or pink, cells obscure, quadrate. |
1–7+, commonly producing either cluster of stalked, basal bulbels or filiform rhizomes to 1 dm, terminated by bulbels, rhizomes generally lost when specimens are collected, ovoid, 1–2 × 0.6–1.8 cm; outer coats enclosing 1 or more bulbs, light brown to gray, membranous, obscurely cellular-reticulate, cells rectangular, walls minutely sinuous, vertical, varying to irregular, all sinuous, without fibers; inner coats white to pink, cells obscure, quadrate. |
Leaves | usually persistent, withering from tip at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat or ± channeled, falcate, 12–25 cm × 2–3 mm, margins entire. |
persistent, green at anthesis, 2–5, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, broadly channeled, 8–30 cm × 1–13 mm, margins entire. |
Scape | persistent, 1–3, erect, solid, terete or somewhat flattened, 2-edged, not expanded proximal to inflorescence, 15–30 cm × 1–3 mm. |
persistent, solitary or clustered 1–3, erect, solid, terete, 10–30(–40) cm × 1–5 mm. |
Umbel | persistent, erect, compact, 10–30-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 5–6-veined, ovate, ± equal, apex acute. |
persistent, erect, loose, 15–40-flowered, globose, bulbils unknown; spathe bracts persistent, 2, 3–4-veined, ovate to lanceolate, ± equal, apex acuminate. |
Flowers | campanulate to substellate, 6–8 mm; tepals spreading, rose-colored, lanceolate, ± equal, becoming papery in fruit, margins entire, apex acuminate; stamens ± equaling tepals, or exserted; anthers blue-gray; pollen light blue or gray; ovary distinctly crested; processes 6, 2 per lobe, low, rounded, margins entire; style exserted, linear; stigma capitate, unlobed; pedicel 8–12 mm. |
stellate, 7–10 mm; tepals spreading, lilac to white, lanceolate, ± equal, becoming papery in fruit, not carinate, margins entire, apex acuminate, not involute; stamens included; anthers purple; pollen yellow; ovary conspicuously crested; processes 6, central, distinct, flattened, triangular, margins papillose-denticulate; style included, linear, ± equaling stamens; stigma capitate, unlobed; pedicel 10–20 mm, often becoming flexuous and deflexed in fruit. |
Seed | coat dull; cells smooth. |
coat shining; cells each with minute, central papilla. |
2n | = 14. |
= 14, 28. |
Allium nevii |
Allium bisceptrum |
|
Phenology | Flowering May–Jul. | Flowering May–Jul. |
Habitat | Heavy, rocky soils, wet meadows, or along streams | Meadows and aspen groves, less commonly on open slopes in mountains |
Elevation | 30–1900 m (100–6200 ft) | 1100–3000 m (3600–9800 ft) |
Distribution |
OR; WA
|
AZ; CA; ID; NM; NV; OR; UT
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Discussion | Two varieties of Allium bisceptrum have been recognized. Where their ranges overlap (central Utah and central Nevada), the putative varieties cannot be distinguished confidently except by chromosome number. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 26, p. 267. | FNA vol. 26, p. 256. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Synonyms | A. douglasii var. nevii | A. bisceptrum var. palmeri, A. bisceptrum var. utahense, A. palmeri |
Name authority | S. Watson: Proc. Amer. Acad. Arts 14: 231. (1879) | S. Watson: Botany (Fortieth Parallel), 351, plate 37, figs. 1–3. (1871) |
Web links |