Allium triquetrum |
Allium constrictum |
|
---|---|---|
three-corner leek, three-cornered leek, white flower onion |
Grand Coulee onion |
|
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 rhizome, ovoid, 1–1.5 × 0.8–1.4 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats white, cells obscure, quadrate. |
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 persistent, green at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, broadly channeled, falcate, 10–35 cm × 1–3(–5) mm, margins entire. |
Scape | persistent, clustered, 1–4, erect, solid, sharply 3-angled, 10–40 cm × 1–10 mm. |
persistent, solitary, erect, solid, terete, enlarged apically but distinctly constricted just proximal to inflorescence, 15–20 cm × 1.5–4 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, compact, 15–30-flowered, hemispheric to globose, bulbils unknown; spathe bracts persistent, 3, 5–7-veined, ovate, ± equal, apex acute. |
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, 7–8 mm; tepals spreading, light pink to rose with prominent green or reddish midribs, narrowly lanceolate, ± equal, becoming papery in fruit, margins entire, apex acuminate; stamens exserted; anthers blue-gray; pollen light blue to gray; ovary crested; processes 6, 2 per lobe, low, rounded, margins entire; style exserted, linear; stigma capitate, unlobed; pedicel 10–20 mm. |
Seed(s) | coat dull; cells minutely roughened. |
coat shining; cells smooth. |
2n | = 18. |
= 14. |
Allium triquetrum |
Allium constrictum |
|
Phenology | Flowering Mar–Apr. | Flowering May–Jul. |
Habitat | Disturbed sites | Shallow, lithosolic soils, often dry and sandy |
Elevation | 0–100 m (0–300 ft) | 300–500 m (1000–1600 ft) |
Distribution |
CA; sw Europe [Introduced in North America]
|
WA
|
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.) |
Of conservation concern. Allium constrictum is known only from Douglas, Grant, and Lincoln counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 26, p. 257. | FNA vol. 26. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Synonyms | A. douglasii var. constrictum | |
Name authority | Linnaeus: Sp. Pl. 1: 300. (1753) | (Ownbey & Mingrone) P. M. Peterson: Syst. Bot. 13: 211. (1988) |
Web links |