UW Burke Herbarium species comparison

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Poa cusickii

Poa nemoralis

Cusick's bluegrass

woodland bluegrass
Habit Smooth, strongly tufted perennial, the culms hollow, 2-4 dm. tall.
Leaves

Sheaths closed about half their length;

ligules 1-3 mm. long, acute, jagged, glabrous;

blades of the fertile stems 1-3.5 mm. broad, flat;

blades of the sterile stems 0.5-1 mm. broad, involute, often 1-2 dm. long; all blades with prow-like tips.

Flowers

Inflorescence a compact, ovoid panicle 2-6 cm. long, greenish or purplish;

spikelets 3- to 5-flowered, 5-8 mm. long;

flowers usually pistillate, the anthers vestigial or wanting, but occasionally the plants staminate- or perfect-flowered;

glumes subequal, 3-nerved, 3.5-5 mm. long, shorter than the first floret;

lemmas keeled, 5-nerved, 4.5-6 mm. long, pubescent;

paleas slightly shorter than the lemmas, 2-keeled.

Poa cusickii

Poa nemoralis
Flowering time May-August May-August
Habitat Sagebrush plains to alpine meadows and ridges. Mesic, generally shady habitats at lower elevations.
Distribution
Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Saskatchewan and Colorado.
[WildflowerSearch map]
[BONAP county map]
Occurring east of the Cascades crest in Washington; Alaska to Caiifornia; also in eastern North America.
[WildflowerSearch map]
[BONAP county map]
Origin Native Introduced from Europe
Conservation status Not of concern Not of concern
Sibling taxa
P. alpina, P. annua, P. arctica, P. bolanderi, P. bulbosa, P. compressa, P. confinis, P. curtifolia, P. fendleriana, P. glauca, P. howellii, P. infirma, P. interior, P. laxiflora, P. leibergii, P. leptocoma, P. lettermanii, P. macrantha, P. marcida, P. ×multnomae, P. nemoralis, P. nervosa, P. palustris, P. paucispicula, P. pratensis, P. secunda, P. stenantha, P. suksdorfii, P. trivialis, P. unilateralis, P. wheeleri
P. alpina, P. annua, P. arctica, P. bolanderi, P. bulbosa, P. compressa, P. confinis, P. curtifolia, P. cusickii, P. fendleriana, P. glauca, P. howellii, P. infirma, P. interior, P. laxiflora, P. leibergii, P. leptocoma, P. lettermanii, P. macrantha, P. marcida, P. ×multnomae, P. nervosa, P. palustris, P. paucispicula, P. pratensis, P. secunda, P. stenantha, P. suksdorfii, P. trivialis, P. unilateralis, P. wheeleri
Subordinate taxa
P. cusickii ssp. cusickii, P. cusickii ssp. epilis, P. cusickii ssp. pallida, P. cusickii ssp. purpurascens
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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