Difference between revisions of "Bromus orcuttianus"
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|common_names=Orcutt's brome | |common_names=Orcutt's brome | ||
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|subfamily=Poaceae subfam. Pooideae | |subfamily=Poaceae subfam. Pooideae | ||
|tribe=Poaceae tribe Bromeae | |tribe=Poaceae tribe Bromeae | ||
Latest revision as of 16:22, 11 May 2021
Plants perennial; not rhizomatous. Culms 90-150 cm, erect; nodes 2-4, pubescent or puberulent; internodes glabrous to pubescent, pilose to densely pubescent below the nodes. Basal sheaths sparingly to densely pilose, hairs 2-4 mm, occasionally glabrous; upper sheaths hairy, hairs to 1 mm, collars glabrous or pilose, hairs to 4 mm; auricles absent; ligules 1-3 mm, usually glabrous, occasionally pilose, obtuse, erose; blades 7-24 cm long, 3-12 mm wide, flat, usually glabrous, sometimes hairy. Panicles 7-13.5 cm, open; branches erect, ascending and appressed to slightly spreading. Spikelets 20-40 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 3-9(11) florets. Glumes usually glabrous, occasionally scabrous or pubescent; lower glumes 5-9 mm, 1(3)-veined; upper glumes 7-11 mm, 3(5)-veined, sometimes mucronate; lemmas 9-16 mm, elliptic, rounded over the midvein, backs usually pubescent, sometimes glabrous or scabrous, margins pubescent or scabrous, apices obtuse, entire; awns (4)5.5-8 mm, straight, arising less than 1.5 mm below the lemma apices; anthers 3-5 mm. 2n = 14.
Distribution
Calif., Ariz., Oreg., Nev., Wash.
Discussion
Bromus orcuttianus grows on dry hillsides and rocky slopes, and in open pine woods and meadows in the mountains, from 500-3500 m. It is found in the western United States, including Washington, Oregon, California, Nevada, and Arizona. It is not known from Mexico.
Selected References
None.