56 



Rooks, Crater Lake (Coville & Leiberg 379); Raveiia (A. B. Leckenby); Portland 

 (B. Killin); Grants Pass (T. Howell 251); hills northwest of Corvallis (M. 

 Craig). California: (J. G. Lennnon 438; C. A. Purpus 5421); Donner Lake 

 (L. H. Pammel); San Jacinto Mountains (H. M. Hall 785); mountains south 

 of Dixie Valley (J. B. Davy); no locality (Vasey). 

 This form is the connecting link between B. marr/inaius and B. polyanthufi. It, like 

 the species, is a mountain plant extending up to about 3000 meters altitude or 

 somewhat higher. In the lower altitudes the panicle tends to become longer 



and laxer, passing into va- 

 riety lafinr. 



32. BROMUS POLYANTHUS 



Scribn. nom. nov. Bromus 

 multiflorus Scribn. T'. S. Dept. 

 Agr. Div. Agrost. Bui. 13: 46. 

 1898. Not Weig. 1772, et al. 

 (Fig. 34.) 



A rather stout, erect, short-lived 

 perennial. Culm smor)th or 

 puberulent at the nodes, mo.st- 

 ly 6-10 dm. high. Sheaths 

 typically KmootJi, rarely sparse- 

 ly pilose; ligule about 2 mm. 

 long, rounded, su ben tire; 

 Ijlades linear-lanceolate, mostly 

 scabrous, especially above. Pan- 

 icle elongate, erect, branches 

 usually short and erect or 

 slightly spreading. Spikelets 

 mostly 3-3.5 cm. long, later- 

 ally compressed, carinate, 

 rather densely 7-11 flowered; 

 empty glumes broad, snmotJi 

 or somewhat scabroas,the\ov;er 

 3-nerved, rather obtuse or 

 subacute, 6-8 mm. long, the 

 upper 5-7 nerved, umst ob- 

 tuse, 9-11 nun. long; flower- 

 ing glume 7 nerved, 13-15 

 mm. long, smooth, or scabrous, 

 rather obtuse, emarginate 

 with a broad, hyaline mar- 

 gin; awn 4-6 mm. long; \>a'u a 

 a little shorter than its gin . 

 Type No. 4024, collected l)y Aven Nelson at Battle Lake, Sierra Madre Mountain.-, 



Wyoming. 

 General distribution: Colorado and Utah north to Montana and Oregon. 

 Specimens examined. — Colorado: Glenwood Springs (Shear & Bessey 1300) ; Buffalo 

 Pass (Shear & Bessey 1434, 1474, 1484); Yampa (Shear & Bessey 1421); Red 

 Dirt Divide, Routt County (Shear & Bessey 1347, 1362, 1385) ; near Pallas (Shear 

 & Bessey 1411); Middle Park (G. Vasey) ; Robinson (C.L. Shear 1045); Rabbit 

 Ears Pass(C. F. Baker 4). Utah: Logan (P. A. Rydberg 2.347) ; Alta (M. E.Jones 

 1111) ; Fairview (M. E. Jones 5554m) . Idaho: Beaver Canyon (C. L. Shear 596; 



Fm.M.— Bromus polyantttus: a, empty glumes with two 

 florets; b, dorsal view of a flowering glume. 



