Page authors: Don Knoke, David Giblin
Allium acuminatum
taper-tip onion

Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east to Wyoming.

Habitat: Balds, grasslands, rocky outcroppings, dry slopes, and other open areas from low to middle elevations in the mountains.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bumblebees, bees, flies, hummingbirds


Scapose perennial herbs from bulbs, the bulbs nearly spherical, usually clustered, the outer coats brownish and with a net-like pattern, the mesh equally long and broad.


Leaves 2 or more, concave-convex in cross section, 1-3 mm. broad, shorter than the scape, withering by flowering; scape 1-3 dm. tall, cylindrical.


Umbel few- to several-flowered; pedicels of equal length, 1-2 times the length of the tepals; outer 3 tepals usually 10-12 mm. long, lanceolate, acuminate, entire, the tips widely spreading, pink or rose-purple to white; inner 3 tepals similar but shorter, narrower and serrulate; stamens 6, two-thirds the length of the tepals; style capitate;


Capsule 3-celled, 6-seeded.

Accepted Name:
Allium acuminatum Hook.
Publication: Fl. Bor.-Amer. 2: 184, plate 196. 1838.

Synonyms & Misapplications:
Allium acuminatum Hook. var. cuspidatum Fernald
Allium cuspidatum (Fernald) Rydb.
Additional Resources:

PNW Herbaria: Specimen records of Allium acuminatum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Allium acuminatum checklist entry.

OregonFlora: Allium acuminatum information.

E-Flora BC: Allium acuminatum atlas page.

CalPhotos: Allium acuminatum photos.

USDA Plants: Allium acuminatum information.

132 photographs:
Group by