Allium anceps |
Allium crenulatum |
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two-edged onion |
Olympic onion, scalloped onion |
|
Bulbs | 1–5; ovoid; outer coats enclosing 1 or more bulbs, membranous; more or less prominently cellular-reticulate; cells transversely elongate; in regular vertical rows, narrowly rectangular; 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 | usually deciduous with scape, withering from tip at anthesis, 2; blades solid; flat, falcate, 7–26 cm × 4–6 mm. |
usually deciduous with scape, withering from tip at anthesis; (1)2; blades solid; flat, falcate, 10–33 cm × 1.5–10 mm. |
Scapes | usually forming abscission layer and deciduous with leaves after seeds mature; solitary; erect; solid, flattened, narrowly winged, 5–15 cm × 1–3 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; erect; more or less compact, 15–35-flowered, hemispheric; pedicels 7–17(20) mm; spathe bracts 2. |
persistent; erect; compact, 10–25-flowered, conic to hemispheric; pedicels 6–16 mm; spathe bracts 2. |
Flowers | 8–12 mm; tepals spreading, linear-lanceolate; more or less equal, light pink with diffuse greenish midveins; margins entire; apex acute; stamens more or less equaling tepals; ovary crested with 6 inconspicuous processes; 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 | =14. |
=14. |
Allium anceps |
Allium crenulatum |
|
Distribution | ||
Discussion | Heavy, usually barren, clay soils, rocky openings in sagebrush steppe. Flowering May–Jun. 700–1900 m. BR, BW, Owy. CA, ID, NV. Native. |
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 136 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 |