Allium crenulatum
Allium shevockii
Olympic onion, scalloped onion
Spanish needle onion
1–6+, replaced annually with new bulbs borne terminally on rhizomes;
rhizomes 1–2, secondary, short;
parent bulb disappearing by anthesis except for still-functional roots and shriveled bulb coat, oblique-ovoid, 1–2 × 0.8–1.8 cm;
outer coats not or only partially enclosing bulbs, brown to gray-brown, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers;
inner coats white, cells very obscurely quadrate or not visible.
2–10+, forming threadlike rhizomes, rhizomes 3–10 cm, terminated by bulbels and/or 1–2 basal bulbels that in turn may produce threadlike rhizomes, ± globose, 1–1.5 × 1–1.5 cm;
outer coats enclosing single bulb, brown, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers;
inner coats light yellow, turning reddish on drying, cells obscure, ± quadrate.
usually deciduous with scape, withering from tip at anthesis, (1–)2, basally sheathing, sheaths not extending much above soil surface;
blade solid, flat, falcate, 10–33 cm × 1.5–10 mm, margins sometimes minutely denticulate.
persistent, withering from tip by anthesis, 1, basally sheathing, sheath not extending much above soil surface;
blade solid, terete, 20–40 cm × 2–4 mm.
usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, ± erect, solid, flattened, winged distally, wings frequently crenulate proximal to umbel, 5–15 cm × 1–5 mm.
persistent, solitary, erect, solid, terete, 10–20+ cm × 1–5 mm.
persistent, erect, compact, 10–25-flowered, conic to hemispheric, bulbils unknown;
spathe bracts persistent, 2, 8–10-veined, lanceolate, ± equal, apex acute.
persistent, erect, compact, 12–30-flowered, globose, bulbils unknown;
spathe bracts persistent, usually 3, 5–7-veined, lanceolate, ± equal, apex apiculate.
campanulate, 6–12 mm;
tepals erect, pinkish with deeper pink midveins, lanceolate, ± equal, becoming papery in fruit, margins entire, apex acute;
stamens included;
anthers yellow or purple;
pollen yellow;
ovary obscurely crested;
processes 3, central, 2-lobed, minute, margins entire;
style linear, equaling stamens;
stigma capitate, scarcely thickened, unlobed;
pedicel 6–16 mm.
campanulate, 12–14 mm;
tepals spreading, unequal;
outer tepals maroon, oblanceolate, margins irregularly shallow-toothed, apex acute to mucronate, reflexed-curled;
inner tepals maroon distally, white proximally, ovate, withering in fruit, curled back at tip, margins entire, apex acute, reflexed;
stamens included;
anthers yellow;
pollen yellow;
ovary crested;
processes 6, prominent, narrowly triangular, margins entire, apex emarginate;
style linear, equaling stamens;
stigma capitate, 3-lobed, lobes slender, recurved;
pedicel 10–16 mm.
coat shining;
cells smooth.
coat shining;
cells minutely roughened.
= 14.
= 14.
Allium crenulatum
Allium shevockii
Allium crenulatum is known only from west of the Cascade Mountains from Vancouver Island to southwestern Oregon, in Jefferson Park, Oregon, and in the Wenatchee Mountains, central Washington.
The disjunct populations of Allium crenulatum in western Oregon are markedly different among themselves and from the more typical representatives to the north. It has thus far proven impossible to draw meaningful taxonomic distinctions among these populations, hence we have followed historical precedent and have placed them all in a single, highly variable species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Allium shevockii is known only from the upper slopes of Spanish Needle Peak in the southern Sierra Nevada and from Horse Canyon, Tehachapi Mountains.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
CA
