Bromus pacificus |
Bromus suksdorfii |
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Pacific brome |
Suksdorf's brome, Suksdorf's bromegrass |
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Habit | Plants perennial; not rhizomatous. | Plants perennial; not rhizomatous. |
Culms | 60-170 cm, erect; nodes (5)6-8, pubescent; internodes usually glabrous, sometimes pubescent near the nodes. |
50-100 cm, erect; nodes 2-3(4), glabrous, internodes glabrous or puberulent just below the nodes. |
Sheaths | pilose, midrib of the culm leaves not abruptly narrowed just below the collar; auricles absent; ligules 2-4 mm, glabrous, truncate, erose or lacerate; blades 20-35(37) mm long, 6-16 mm wide, flat, abaxial surfaces glabrous, adaxial surfaces pilose. |
glabrous; auricles absent; ligules to 1 mm, glabrous, truncate; blades (8)12-19(24) cm long, 4-8(14) mm wide, flat, glabrous, margins scabrous. |
Panicles | 10-25 cm, open, nodding; branches ascending, spreading, or drooping. |
6-14 cm, erect, contracted; branches erect or ascending. |
Spikelets | 20-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (4)6-10 florets. |
15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (3)5-7 florets. |
Glumes | pubescent; lower glumes 6-8.5 mm, 1(3)-veined; upper glumes 8-11.5 mm, 3-veined, not mucronate; lemmas 10-12 mm, lanceolate, rounded over the midvein, backs pubescent, margins more densely so, apices acute, entire; awns 3.5-7 mm, straight, arising less than 1.5 mm below the lemma apices; anthers 2-4 mm. |
glabrous or sparsely pubescent; lower glumes 7-11 mm, 1(3)-veined; upper glumes 9-12 mm, 3-veined; lemmas 12-15 mm, elliptic, rounded over the midvein, backs and margins pubescent or nearly glabrous, apices obtuse, entire; awns 2-5 mm, straight, arising less than 1.5 mm below the lemma apices; anthers 2-3.5 mm. |
2n | = 28. |
= 14. |
Bromus pacificus |
Bromus suksdorfii |
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Distribution |
AK; OR; WA; BC
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CA; ID; NV; OR; WA
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Discussion | Bromus pacificus grows in moist thickets, openings, and ravines along the Pacific coast from southeastern Alaska to northern California, with a few occurrences further inland. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Bromus suksdorfii grows on open slopes and in open subalpine forests, at about 1300-3300 m, from southern Washington to southern California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 218. | FNA vol. 24, p. 218. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromopsis | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromopsis |
Sibling taxa | ||
Synonyms | Bromopsis pacifica | |
Name authority | Shear | Vasey |
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