Bromus pacificus |
Bromus maritimus |
|
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Pacific brome |
maritime brome, seaside brome |
|
Habit | Plants perennial; not rhizomatous. | Plants perennial; loosely cespitose. |
Culms | 60-170 cm, erect; nodes (5)6-8, pubescent; internodes usually glabrous, sometimes pubescent near the nodes. |
20-70 cm tall, to 3 mm thick, sometimes geniculate at the base. |
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. |
usually smooth or scabridulous, sometimes slightly pubescent distally, not pilose at the throat; auricles absent; ligules 1-6 mm, densely hairy to ciliolate, acute to obtuse, erose; blades 6-13 cm long, 6-8 mm wide, flat, both surfaces glabrous, sometimes scabrous. |
Panicles | 10-25 cm, open, nodding; branches ascending, spreading, or drooping. |
9-20 cm long, 2-2.5 cm wide, dense; lower branches shorter than 10 cm, 2-4 per node, erect, with 1-2 spikelets variously distributed. |
Spikelets | 20-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (4)6-10 florets. |
20-40 mm, usually longer than the branches and pedicels, elliptic to lanceolate, strongly laterally compressed, crowded, overlapping, with 3-7 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. |
pubescent; lower glumes 8-12 mm, (3)5(7)-veined; upper glumes 10-13 mm, 7(9)-veined, shorter than the lowest lemma; lemmas 12-14 mm, lanceolate, laterally compressed, distinctly 9-11-veined, strongly keeled at least distally, more or less uniformly hairy, often with bronze hyaline margins, apices entire or with acute teeth shorter than 1 mm; awns (2)4-7 mm; anthers 2-4 mm. |
2n | = 28. |
= 56. |
Bromus pacificus |
Bromus maritimus |
|
Distribution |
AK; OR; WA; BC
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CA; OR
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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 maritimus grows in coastal sands from Lane County, Oregon, to Los Angeles County, California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 218. | FNA vol. 24, p. 202. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromopsis | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Ceratochloa |
Sibling taxa | ||
Synonyms | Bromopsis pacifica | B. carinatus var. maritimus |
Name authority | Shear | (Piper) Hitchc. |
Web links |
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