Allium constrictum |
Allium douglasii |
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Grand Coulee onion |
Douglas' onion |
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Habit | Scapose perennial from one or more ovoid bulbs, the inner coats reddish to white, the outer coats gray to brown; with a thin inner membrane showing a distinct network pattern. | Scapose perennial from one or more ovoid bulbs, the inner coats reddish to white, the outer coats gray to brown; with a thin inner membrane showing a distinct network pattern. |
Leaves | Leaves 2, narrow, concave-convex, persisting at maturity, shorter than the scape; scape strongly thickened below the umbel, with a definite constriction between the swollen apex of the scape and the umbel; scape usually 2-3 dm. tall, terete. |
Leaves 2, broad and flat, up to 15 mm. broad, persisting at maturity, shorter than the scape; scape usually 2-3 dm. tall, terete. |
Flowers | Umbel several- to many-flowered, the slender pedicels 2-3 times the length of the tepals; tepals usually 7-8 mm. long, entire, pointed, narrowly lanceolate, usually pink; stamens 6, about as long as the tepals. |
Umbel several- to many-flowered, the slender pedicels 2-3 times the length of the tepals; tepals usually 7-8 mm. long, entire, pointed, narrowly lanceolate, usually pink; stamens 6, about as long as the tepals. |
Fruits | Capsule 3-celled. |
Capsule 3-celled. |
Allium constrictum |
Allium douglasii |
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Flowering time | May-July | May-July |
Habitat | Shallow, vernally-moist soils in low, open areas. | Open, vernally-moist areas at low to moderate elevations. |
Distribution | Occurring east of the Cascades crest in Grant and Douglas counties in Washington.
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Occurring east of the Cascades crest in Washington; central and eastern Washington to northeastern Oregon.
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Origin | Native | Native |
Conservation status | Sensitive in Washington (WANHP) | Not of concern |
Sibling taxa | ||
Web links |