UW Burke Herbarium species comparison

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Allium crenulatum

Allium robinsonii

scalloped onion

Robinson's onion
Habit Scapose perennial from an obliquely ovoid bulb, the outer coats whitish or grayish, without a network pattern. Scapose perennial from ovoid bulbs, solitary or clustered, outer coats grayish or brownish, without a network pattern.
Leaves

Leaves usually 2, flattened, somewhat curved, longer than the scape and deciduous at maturity;

scape strongly flattened and two-edged, the margins often wavy.

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 several- to many-flowered, the pedicels about as long as the tepals;

tepals 6, 6-12 mm. long, lanceolate, pointed, pinkish with deeper pink mid-veins;

stamens 6, about the length of the tepals;

anthers yellow or purplish.

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, obscurely crested.

Capsule 3-celled, crested with 3 low processes.

Allium crenulatum

Allium robinsonii
Flowering time May-July April-May
Habitat Forest openings and mountain meadows, moderate to high elevations. Sand and gravel near the river to rocky, even lithosol benches.
Distribution
Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon.
[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. 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
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
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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