Bromus pacificus |
Bromus lanatipes |
|
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Pacific brome |
woolly brome, wooly brome |
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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. |
40-90 cm, erect; nodes 3-5(7), mainly pubescent; internodes mostly glabrous, puberulent near 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. |
|
Panicles | 10-25 cm, open, nodding; branches ascending, spreading, or drooping. |
10-25 cm, open, nodding; branches ascending to spreading. |
Spikelets | 20-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (4)6-10 florets. |
10-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 7-12(16) 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. |
usually glabrous, sometimes pubescent; lower glumes 5-6.5(7) mm, 1(3)-veined; upper glumes (6)7-9 mm, 3-veined, not mucronate; lemmas 8-11 mm, elliptic, rounded over the midvein, backs and margins pubescent, sometimes nearly glabrous, apices truncate or obtuse, entire, rarely emarginate, lobes shorter than 1 mm; awns 2-4 mm, straight, arising less than 1.5 mm below the lemma apices; anthers 1.8-4 mm. |
Basal | sheaths densely pilose or glabrous; upper sheaths glabrous or almost so, midrib of the culm leaves not abruptly narrowed just below the collar; auricles absent; ligules 1-2 mm, glabrous, truncate or obtuse, sometimes lacerate; blades 5-20 cm long, to 7 mm wide, flat, both surfaces glabrous, sometimes scabrous. |
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2n | = 28. |
= 28. |
Bromus pacificus |
Bromus lanatipes |
|
Distribution |
AK; OR; WA; BC
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AZ; CO; NM; OK; TX
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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 lanatipes grows in a wide range of habitats at 800-2500 m, from Wyoming through the southwestern United States to northern Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 218. | FNA vol. 24, p. 220. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromopsis | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromopsis |
Sibling taxa | ||
Synonyms | Bromopsis pacifica | B. anomalus var. lanatipes, Bromopsis lanatipes |
Name authority | Shear | (Shear) Rydb. |
Web links |
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