Allium crenulatum |
Allium validum |
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Olympic onion, scalloped onion |
Pacific swamp onion |
|
Bulbs | 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. |
2–20+, clustered on thick; iris-like rhizome, elongate; outer coats enclosing 1 or more bulbs, membranous, minutely striate; cells in regular vertical rows, elongate, not fibrous-reticulate; fibers persistent; parallel; few; coarse. |
Leaves | usually deciduous with scape, withering from tip at anthesis; (1)2; blades solid; flat, falcate, 10–33 cm × 1.5–10 mm. |
persistent, green at anthesis, 3–6; blades solid; flat, 20–70(80) cm × 4–15 mm. |
Scapes | 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. |
persistent; solitary; erect; solid, flattened and narrowly winged distally, 30–70 cm × 2–7 mm. |
Umbels | persistent; erect; compact, 10–25-flowered, conic to hemispheric; pedicels 6–16 mm; spathe bracts 2. |
persistent; erect; compact, 15–30-flowered, hemispheric; pedicels 10–15 mm, elongating and becoming stout in fruit; spathe bracts 2. |
Flowers | 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. |
8–10 mm; tepals erect to more or less spreading, narrowly lanceolate; more or less equal, pink; margins entire; apex acuminate; midribs scarcely thickened; stamens exserted; ovary crestless; stigma unlobed. |
2n | =14. |
=28, 56. |
Allium crenulatum |
Allium validum |
|
Distribution | ||
Discussion | 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. |
Wet meadows, fens, springs, and stream banks in mountains. Flowering Jun–Sep. 500–2500 m. BR, BW, Casc, ECas, Sisk. CA, ID, NV, WA. Native. |
Source | Flora of Oregon, volume 1, page 138 Nick Otting, Richard Brainerd, Barbara Wilson |
Flora of Oregon, volume 1, page 144 Nick Otting, Richard Brainerd, Barbara Wilson |
Sibling taxa | ||
Synonyms | Allium cascadense, Allium watsonii | |
Web links |