Bromus porteri |
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nodding brome, Porter brome, Porter's brome |
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Habit | Plants perennial; not rhizomatous. |
Culms | 30-100 cm, erect; nodes (2)3-4(5), glabrous or pubescent; internodes mostly glabrous, puberulent near the nodes. |
Sheaths | glabrous or pilose, midrib of the culm leaves not abruptly narrowed just below the collar; auricles absent; ligules to 2.5 mm, glabrous, truncate or obtuse, erose or lacerate; blades (3)10-25(35) cm long, 2-5(6) mm wide, flat, not glaucous, both surfaces usually glabrous, sometimes the adaxial surface pilose. |
Panicles | 7-20 cm, open, nodding, often 1-sided; branches slender, ascending to spreading, often recurved and flexuous. |
Spikelets | 12-38 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (3)5-11(13) florets. |
Glumes | usually pubescent, rarely glabrous; lower glumes 5-7(9) mm, usually 3-veined, sometimes 1-veined; upper glumes 6-10 mm, 3-veined, not mucronate; lemmas 8-14 mm, elliptic, rounded over the midvein, usually pubescent or pilose, margins often with longer hairs, backs and margins rarely glabrous, apices acute or obtuse to truncate, entire; awns (1)2-3(3.5) mm, straight, arising less than 1.5 mm below the lemma apices; anthers (1)2-3 mm. |
2n | = 14. |
Bromus porteri |
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Distribution |
AZ; CA; CO; ID; MT; ND; NE; NM; NV; SD; TX; UT; WY; MB; SK
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Discussion | Bromus porteri grows in montane meadows, grassy slopes, mesic steppes, forest edges, and open forest habitats, at 500-3500 m. It is found from British Columbia to Manitoba, and south to California, western Texas, and Mexico. It is closely related to B. anomalus, and has often been included in that species. It differs chiefly in its lack of auricles, and in having culm leaves with midribs that are not narrowed just below the collar. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 213. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromopsis |
Sibling taxa | |
Synonyms | Bromopsis ported |
Name authority | (J.M. Coult.) Nash |
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