Burke: Allium geyeri vs. Allium robinsonii

	Allium geyeri	Allium robinsonii
	Geyer's onion	Robinson's onion
Habit	Scapose perennial, usually from a cluster of ovoid bulbs enclosed in fibrous, outer coats with a coarse network pattern; scapes 1-5 dm. tall, nearly terete.	Scapose perennial from ovoid bulbs, solitary or clustered, outer coats grayish or brownish, without a network pattern.
Leaves	Leaves usually 3 or more per scape, concave-convex in cross section, 1-5 mm. broad, usually shorter than the scape, green, becoming brown and persisting.	Leaves 2, flat, recurved, much longer than the scape, and with it breaking off at the ground at maturity; scape flattened and 2-edged; bracts 2, ovate, purple.
Flowers	Umbels 10- to 25-flowered, the pedicels equal in length, nearly twice the length of the perianth, becoming stiffly spreading in fruit; tepals 6, 6-8 mm. long, ovate to lanceolate, pink to rarely white; stamens 6, shorter than the tepals; ovary inconspicuously crested with 6 low, rounded knobs.	Umbel few- to many-flowered, the pedicels shorter than the tepals; tepals 7-12 mm. long, oblong to lanceolate, white to pale pink with pink mid-nerves; stamens 6, about 1/3 the length of the tepals; anthers reddish; stigma capitate, entire.
Fruits	Capsule 3-celled.	Capsule 3-celled, crested with 3 low processes.

	Allium geyeri	Allium robinsonii
Flowering time	May-June	April-May
Habitat	Low meadows and along streams.	Sand and gravel near the river to rocky, even lithosol benches.
Distribution	Occurring east of the Cascades crest in Washington; southern Vancouver Island to Arizona, east to the Rocky Mountains and northern Great Plains. [WildflowerSearch map] [BONAP county map]	Near the Columbia River in Washington; Washington south to north-central Oregon. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	A. acuminatum, A. amplectens, A. campanulatum, A. cernuum, A. columbianum, A. constrictum, A. crenulatum, A. dictuon, A. douglasii, A. fibrillum, A. macrum, A. nevii, A. robinsonii, A. schoenoprasum, A. scilloides, A. textile, A. tolmiei, A. validum, A. vineale	A. acuminatum, A. amplectens, A. campanulatum, A. cernuum, A. columbianum, A. constrictum, A. crenulatum, A. dictuon, A. douglasii, A. fibrillum, A. geyeri, A. macrum, A. nevii, A. schoenoprasum, A. scilloides, A. textile, A. tolmiei, A. validum, A. vineale
Subordinate taxa	A. geyeri var. geyeri, A. geyeri var. tenerum
Web links	Local floras: BC, OR, 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	Local floras: OR, WA Local Web sites: Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Allium geyeri

Allium robinsonii

Geyer's onion

Robinson's onion

Habit

Scapose perennial, usually from a cluster of ovoid bulbs enclosed in fibrous, outer coats with a coarse network pattern; scapes 1-5 dm. tall, nearly terete.

Scapose perennial from ovoid bulbs, solitary or clustered, outer coats grayish or brownish, without a network pattern.

Leaves

Leaves usually 3 or more per scape, concave-convex in cross section, 1-5 mm. broad, usually shorter than the scape, green, becoming brown and persisting.

Leaves 2, flat, recurved, much longer than the scape, and with it breaking off at the ground at maturity;

scape flattened and 2-edged;

bracts 2, ovate, purple.

Flowers

Umbels 10- to 25-flowered, the pedicels equal in length, nearly twice the length of the perianth, becoming stiffly spreading in fruit;

tepals 6, 6-8 mm. long, ovate to lanceolate, pink to rarely white;

stamens 6, shorter than the tepals;

ovary inconspicuously crested with 6 low, rounded knobs.

Umbel few- to many-flowered, the pedicels shorter than the tepals;

tepals 7-12 mm. long, oblong to lanceolate, white to pale pink with pink mid-nerves;

stamens 6, about 1/3 the length of the tepals;

anthers reddish;