Bromus orcuttianus
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.
Lower Taxa
"decumbent" is not a number.