Allium triquetrum |
Allium crenulatum |
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three-corner leek |
Olympic onion, scalloped onion |
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Bulbs | 5–20+; increase bulbs absent or more or less equaling parent bulbs, never appearing as basal cluster; ovoid; outer coats enclosing renewal bulbs; more or less translucent, obscurely cellular-reticulate; thin, membranous; meshes delicate; cells vertically elongate, contorted; without fibers. |
1–6+, replaced annually with new bulbs borne terminally on short; secondary rhizomes, parent bulb disappearing by anthesis except for still-functional roots and shriveled bulb coat, oblique-ovoid; outer coats not or only partially enclosing bulbs, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows adjacent to roots; more or less quadrate; without fibers. |
Leaves | persistent, green at anthesis, 2–3; blades solid; flat, not falcate; more or less keeled, 15–50 cm × 3–15 mm; margins entire. |
usually deciduous with scape, withering from tip at anthesis; (1)2; blades solid; flat, falcate, 10–33 cm × 1.5–10 mm. |
Scapes | persistent, clustered; erect; solid, sharply 3-angled, 10–40 cm × 1–10 mm. |
usually forming abscission layer and deciduous with leaves after seeds mature; solitary; more or less erect; solid, flattened, winged distally; wings frequently crenulate proximal to umbel, 5–15 cm × 1–5 mm. |
Umbels | persistent; lax; loose, 3–15-flowered; more or less 1-sided; pedicels 15–25 mm; spathe bracts 1–2. |
persistent; erect; compact, 10–25-flowered, conic to hemispheric; pedicels 6–16 mm; spathe bracts 2. |
Flowers | becoming pendent, 10–18 mm; tepals erect to spreading, lanceolate; more or less equal, white with prominent green midrib; margins entire; apex acute; stamens included; ovary crestless; stigma scarcely thickened, unlobed. |
6–12 mm; tepals erect, lanceolate; more or less equal, white to pinkish with deeper pink, purple or greenish midveins; margins entire; apex acute; stamens included; ovary obscurely crested with 3 minute, 2-lobed processes; stigma scarcely thickened, unlobed. |
2n | =18. |
=14. |
Allium triquetrum |
Allium crenulatum |
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Distribution | ||
Discussion | Road ditches, lawns, and other disturbed moist sites. Flowering Apr–Jul. 400–2800 m. BR, BW, Col, ECas, Lava, Owy. CA; Europe. Exotic. Allium triquetrum is cultivated for its attractive flowers. It readily escapes in south coastal Oregon and California and has potential to become invasive. |
Talus slopes and clay soils, including serpentine, on bald summits and ridges. Flowering May–Jul. 0–1400 m. BW, Casc, CR, ECas, Est, WV. WA; north to British Columbia. Native. Oregon’s Allium crenulatum populations differ morphologically and are quite variable. It is tempting to name some of them, but so far botanists have been unable to find consistent, clear patterns, so all are treated as a single highly variable species. |
Source | Flora of Oregon, volume 1, page 144 Nick Otting, Richard Brainerd, Barbara Wilson |
Flora of Oregon, volume 1, page 138 Nick Otting, Richard Brainerd, Barbara Wilson |
Sibling taxa | ||
Synonyms | Allium cascadense, Allium watsonii | |
Web links |