Allium dichlamydeum |
Allium tribracteatum |
|
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coast onion, coastal onion |
three-bract onion |
|
Bulbs | 1–3, increase bulbs absent or ± equaling parent bulbs, never appearing as basal cluster, not clustered on stout primary rhizome, ovoid to ± globose, 10–15 mm; outer coats enclosing 1 or more bulbs, brown, prominently cellular-reticulate, membranous, cells arranged in ± vertical rows, forming distinct herringbone pattern, transversely elongate, V-shaped, without fibers; inner coats white, cells obscure, arranged in vertical rows, forming distinct herringbone pattern, transversely elongate, V-shaped. |
generally 2–5+, not clustered on stout primary rhizome, ovoid, 1–2 × 0.8–1.8 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, prominently cellular-reticulate, cells irregularly arranged, ± transversely elongate, curved, without fibers; inner coats white, cells obscure, ± transversely elongate, irregularly arranged, curved. |
Leaves | persistent, withering from tip by anthesis, 3–6, basally sheathing, sheaths not extending much above soil surface; blade solid, subterete or ± channeled, arcuate to ± tortuous, 7–25 cm × 1–3 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 or broadly channeled, ± falcate, 12–20 cm × 1–3.5 mm, margins entire. |
Scape | persistent, solitary, erect, solid, terete, 10–30 cm × 2–3 mm. |
usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, terete, 2–7 cm × 0.5–1.5 mm. |
Umbel | persistent, erect, compact, 5–30-flowered, conic to hemispheric, bulbils unknown; spathe bracts persistent, 2, 4–6-veined, broadly ovate, ± equal, apex abruptly acuminate. |
persistent, erect, compact, 10–30-flowered, hemispheric, bulbils unknown; spathe bracts persistent, (2–)3(–4), 4–5-veined, ovate, ± equal, apex abruptly acuminate to apiculate. |
Flowers | campanulate, 9–12 mm; tepals ± erect, deep reddish purple, ovate, unequal, inner shorter and narrower than outer, becoming rigid and ± carinate in fruit, margins entire or inner minutely denticulate, apex acute to obtuse, spreading to recurved at tips; stamens included; anthers yellow; pollen yellow; ovary crested; processes 3, central, 2-lobed, minute, margins entire; style linear, equaling stamens; stigma capitate, scarcely thickened, unlobed or minutely 3-lobed; pedicel 5–20 mm. |
campanulate, 6.5–8 mm; tepals erect, white to pink with dark pink or purplish midvein, lanceolate to ± elliptic, ± equal, becoming papery in fruit, margins entire, apex acute; stamens included; anthers purple; pollen gray; ovary crested; processes 3, acute, ± lateral, margins entire; style linear, shorter than stamens; stigma capitate, scarcely thickened, unlobed; pedicel 6–9 mm. |
Seed | coat dull or shining; cells minutely roughened. |
coat dull; cells ± smooth. |
2n | = 14. |
= 14. |
Allium dichlamydeum |
Allium tribracteatum |
|
Phenology | Flowering May–Jul. | Flowering Mar–May. |
Habitat | Dry, clay soils on or near sea cliffs | Rocky, volcanic soils |
Elevation | 10–50 m (0–200 ft) | 1300–3000 m (4300–9800 ft) |
Distribution |
CA
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CA
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Discussion | Of conservation concern. Allium tribracteatum is known only from the Sierra Nevada in Tuolumne County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 26, p. 264. | FNA vol. 26, p. 269. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Name authority | Greene: Pittonia 1: 166. (1888) | Torrey: Pacif. Railr. Rep. 4(5): 148. (1857) |
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