Burke: Allium constrictum

	Allium constrictum
	Grand Coulee onion
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.
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.
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.
Fruits	Capsule 3-celled.

	Allium constrictum
Flowering time	May-July
Habitat	Shallow, vernally-moist soils in low, open areas.
Distribution	Occurring east of the Cascades crest in Grant and Douglas counties in Washington. [WildflowerSearch map] [BONAP county map]
Origin	Native
Conservation status	Sensitive in Washington (WANHP)
Sibling taxa	A. acuminatum, A. amplectens, A. campanulatum, A. cernuum, A. columbianum, A. crenulatum, A. dictuon, A. douglasii, A. fibrillum, A. geyeri, A. macrum, A. nevii, A. robinsonii, A. schoenoprasum, A. scilloides, A. textile, A. tolmiei, A. validum, A. vineale
Web links	Local floras: WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Allium constrictum

Grand Coulee onion

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.

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.

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.

Fruits

Capsule 3-celled.