Allium triquetrum |
Allium dictuon |
|
---|---|---|
three-corner leek, three-cornered leek, white flower onion |
Blue Mountain 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. |
usually solitary, forming rhizomes; rhizomes 1–2, terminated by 1–3 new bulbs, short, slender; parent bulb disappearing by anthesis except for still-functional roots and bulb coats, not basally clustered, oblique-ovoid, 1–1.5 × 0.9–1.5 cm; outer coats not enclosing bulbs, pale brown, prominently cellular-reticulate, membranous, cells polygonal to oblong, walls thick, obscurely sinuous, without fibers; inner coats white, cells ± transversely elongate, intricately contorted. |
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. |
persistent, withering from tip by anthesis, 2–3, basally sheathing, sheaths not extending much above soil surface; blade solid, subterete to ± channeled, 10–28 cm × 1–2 mm, margins entire. |
Scape | persistent, clustered, 1–4, erect, solid, sharply 3-angled, 10–40 cm × 1–10 mm. |
persistent, solitary, erect, solid, terete, 20–40 cm × 1–3 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, 10–25-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 3-veined, lanceolate to lance-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. |
campanulate, 11–16 mm; tepals erect, pink to rose-purple, lanceolate, unequal, outer tepal longer and wider than inner, becoming rigid and keeled in fruit, margins finely denticulate (inner tepal more prominently so), apex acute to narrowly obtuse, becoming involute and appearing long-acuminate, flaring toward tips; stamens included; anthers yellow; pollen yellow; ovary crested; processes 3, central, 2-lobed, rounded, minute, margins entire; style linear, equaling stamens; stigma capitate, scarcely thickened, obscurely 3-lobed; pedicel 10–25 mm. |
Seed(s) | coat dull; cells minutely roughened. |
coat shining; cells minutely roughened. |
2n | = 18. |
= 14. |
Allium triquetrum |
Allium dictuon |
|
Phenology | Flowering Mar–Apr. | Flowering Jun–Jul. |
Habitat | Disturbed sites | Rocky, sandy, basaltic soil |
Elevation | 0–100 m (0–300 ft) | 1500 m (4900 ft) |
Distribution |
CA; sw Europe [Introduced in North America]
|
WA
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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.) |
Of conservation concern. Allium dictuon is known only from the vicinity of Weller’s Butte, Blue Mountains. It differs from A. acuminatum by its rhizomatous habit, in which it resembles A. bolanderi, and in the cellular pattern on the inner bulb coats. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 26, p. 257. | FNA vol. 26, p. 261. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Name authority | Linnaeus: Sp. Pl. 1: 300. (1753) | H. St. John: Proc. Biol. Soc. Wash. 50: 3, fig. 1. (1937) |
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