Allium anceps |
Allium membranaceum |
|
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Kellogg's onion, twin leaf onion, two-edge onion |
papery onion |
|
Bulbs | 1–5, not clustered on stout primary rhizome, ovoid, 1.5–2 × 1.2–2 cm; outer coats enclosing 1 or more bulbs, brown to yellow-brown, membranous, ± prominently cellular-reticulate, cells in regular vertical rows, narrowly rectangular, transversely elongate, without fibers; inner coats white, cells obscure, transversely elongate. |
1–3, producing bulbels in basal cluster around roots, ovoid, 1–1.6 × 0.9–1.4 cm; outer coats enclosing 1 or more bulbs, brown, membranous, obscurely cellular-reticulate, cells quadrate, walls very sinuous, without fibers; inner coats white or pink, cells obscure, quadrate. |
Leaves | usually deciduous with scape, withering from tip at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, falcate, 7–26 cm × 4–6 mm, margins entire. |
persistent, green at anthesis, 2–3, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, 15–40 cm × 3–5 mm, margins entire. |
Scape | usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, flattened, narrowly winged, 10–15 cm × 1–3 mm. |
persistent, solitary, erect, solid, terete, 15–40 cm × 1–3 mm. |
Umbel | persistent, erect, ± compact, 15–35-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 10–13-veined, ovate, ± equal, apex acute. |
persistent, erect, loose, 15–35-flowered, ± globose, bulbils unknown; spathe bracts persistent, 2, 4–6-veined, lanceolate, ± equal, apex acuminate, setaceous. |
Flowers | stellate, 8–12 mm; tepals spreading, light pink with diffuse greenish midveins, linear-lanceolate, ± equal, papery, withering in fruit, margins entire, apex acute; stamens ± equaling tepals; anthers yellow; pollen yellow; ovary crested; processes 6, central, rounded, minute, margins entire; style linear, 0.5 times stamens; stigma capitate, scarcely thickened, unlobed; pedicel 15–30 mm. |
stellate, 7–12 mm; tepals spreading, pink or less commonly white, ovate to elliptic, ± equal, becoming papery in fruit, not carinate, margins entire, apex acute to acuminate, not involute; stamens included; anthers yellow; pollen yellow; ovary crested; processes 6, prominent, central, triangular, short, margins minutely denticulate; style linear, equaling stamens; stigma capitate, scarcely thickened, unlobed; pedicel 10–20 mm. |
Seed | coats dull; cells smooth. |
coat dull; cells each with minute, central papilla. |
2n | = 14. |
= 14. |
Allium anceps |
Allium membranaceum |
|
Phenology | Flowering Apr–May. | Flowering May–Jun. |
Habitat | Heavy, generally barren, clay soils | Wooded, shady slopes |
Elevation | 1200–1600 m (3900–5200 ft) | 200–1400 m (700–4600 ft) |
Distribution |
CA; ID; NV; OR
|
CA |
Discussion | Allium membranaceum is found in the foothills of the northern and central Sierra Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 26, p. 270. | FNA vol. 26, p. 256. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Name authority | Kellogg: Proc. Calif. Acad. Sci. 2: 109. (1863) | Ownbey ex Traub: Pl. Life 28: 63. (1972) |
Web links |