UW Burke Herbarium species comparison

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Elymus macgregorii

Elymus elymoides

bottlebrush, squirreltail
Habit Tufted perennial, the culms sub-glabrous to pubescent, 1-6 dm. tall.
Leaves

Sheaths open;

auricles less than 1 mm. long, sometimes lacking;

ligules membranous, barely 0.5 mm. long;

blades flat to folded or involute, 1-4 mm. broad.
Flowers

Inflorescence a single terminal spike 3-15 cm. long, often partly included in the upper sheath, the rachis readily disarticulating;

spikelets 1- to 6-flowered, usually 2 per node, borne flatwise on the rachis;

glumes 1- or 2-nerved, simple to bifid, tapering to 1-2 divaricate awns 3-10 cm. long;

florets varying from all fertile to all but one sterile;

lemmas scabrous to puberulent, 5-nerved, the main nerve extending into an awn about equal to the glumes, the 2 lateral nerves often extended and bristle-like;

paleas 2-nerved, the nerves often extended into bristles up to 5 mm. long.

Elymus macgregorii

Elymus elymoides
Flowering time May-August
Habitat Dry and rocky to moist habitats, from along the coast to inland desert plains and prairies, and to the alpine.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occurring on both sides of the Cascades crest in Washington; British Columbia to southern California, east to the Great Plains and eastern North America.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
E. albicans, E. canadensis, E. curvatus, E. elymoides, E. glaucus, E. ×hansenii, E. hirsutus, E. lanceolatus, E. multisetus, E. ×pseudorepens, E. repens, E. scribneri, E. sierrae, E. trachycaulus, E. violaceus, E. wawawaiensis
E. albicans, E. canadensis, E. curvatus, E. glaucus, E. ×hansenii, E. hirsutus, E. lanceolatus, E. multisetus, E. ×pseudorepens, E. repens, E. scribneri, E. sierrae, E. trachycaulus, E. violaceus, E. wawawaiensis
Subordinate taxa
E. elymoides ssp. brevifolius, E. elymoides ssp. elymoides, E. elymoides ssp. hordeoides
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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