Allium triquetrum |
Allium platycaule |
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three-corner leek, three-cornered leek, white flower onion |
broad-stem onion, flat-stem onion |
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Bulbs | 5–20+, not clustered on stout primary rhizome, rhizomes absent, increase bulbs absent or ± equaling parent bulbs, never appearing as basal cluster, ovoid, 1–2 × 1–2 cm; outer coats enclosing renewal bulbs, ± translucent, yellow-brown, obscurely cellular-reticulate, thin, membranous, meshes delicate, cells vertically elongate, contorted, without fibers; inner coats white, cells obscure, quadrate, or not visible. |
1–5+, not clustered on stout primary rhizomes, renewal bulbs formed within coats of parent bulb, ovoid, 2–3 × 1.4–2.5 cm, increase bulbs ± equaling parent bulbs, rhizomes absent; outer coats enclosing 1 or more bulbs, gray or brown, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats white, cells obscure, quadrate to rectangular, or not visible. |
Leaves | persistent, green at anthesis, 2–3, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, not falcate, ± carinate, 15–50 cm × 3–15 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, 10–30-cm × 8–18 mm, margins entire. |
Scape | persistent, clustered, 1–4, erect, solid, sharply 3-angled, 10–40 cm × 1–10 mm. |
usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, strongly flattened, winged distally, 7–25 cm × 2–7 mm. |
Umbel | persistent, lax, loose, 3–15-flowered, ± 1-sided, bulbils unknown; spathe bracts persistent, 1–2, 3-veined, narrowly lanceolate, ± equal, apex acute. |
persistent, erect, loose, 30–90-flowered, globose, bulbils unknown; spathe bracts persistent, 2–5, 10–15-veined, lanceolate to broadly ovate, ± equal, apex acuminate. |
Flowers | becoming pendent, campanulate, 10–18 mm; tepals erect to spreading, white with prominent green midrib, lanceolate, ± equal, becoming membranous in fruit, margins entire, apex acute; stamens included; anthers yellow; pollen yellow; ovary crestless; style linear, ± equaling stamens; stigma capitate, scarcely thickened, unlobed; pedicel 15–25 mm. |
stellate, 8–15 mm; tepals spreading, bright pink to rose, narrowly lanceolate, ± equal, becoming erect, rigid, constricted distal to ovary in fruit, margins entire, apex long-acuminate; stamens exserted; anthers yellow; pollen gray; ovary crestless; style linear, equaling stamens; stigma capitate, scarcely thickened, unlobed, apex acute; pedicel 10–25 mm. |
Seed(s) | coat dull; cells minutely roughened. |
coat dull or shining; cells smooth. |
2n | = 18. |
= 14. |
Allium triquetrum |
Allium platycaule |
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Phenology | Flowering Mar–Apr. | Flowering May–Jun. |
Habitat | Disturbed sites | Rocky, sandy slopes |
Elevation | 0–100 m (0–300 ft) | 1500–2500 m (4900–8200 ft) |
Distribution |
CA; sw Europe [Introduced in North America]
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CA; NV; OR
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Discussion | Allium triquetrum is a garden escape, introduced from southwestern Europe, and is potentially a noxious weed. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 26, p. 257. | FNA vol. 26, p. 274. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Name authority | Linnaeus: Sp. Pl. 1: 300. (1753) | S. Watson: Proc. Amer. Acad. Arts 14: 234. (1879) |
Web links |