46 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



24. Bromus anomalus Rupr. Nod- 

 ding brome. (Fig. 23.) Culms slender, 

 30 to GO cm. tall, the nodes pubes- 

 cent; sheaths sparsely pilose to gla- 

 brous; ligule about 1 mm. long; 

 blades scabrous, mostly 2 to 4 mm. 

 wide; panicle about 10 cm. long, 

 often less, few-flowered, drooping; 

 first glume 3-nerved, the second 5- 

 nerved, lemmas about 12 mm. long, 

 evenly and densely pubescent over 

 the back; awn 2 to 4 mm. long. 

 % (B. porteri Nash.) — Open woods, 

 Saskatchewan to North Dakota and 

 south to western Texas, southern 

 California, and Mexico. 



Bromus anomalus var. lanatipes 

 (Shear) Hitchc. More robust, with 

 woolly sheaths and usually broader 

 blades. % (B. porteri lanatipes 

 Shear.) — Colorado to western Texas 

 and Arizona. 



lets; first glume 3-nerved, the second 

 5-nerved; lemmas 7 to 10 mm. long, 

 villous over the back, more densely 

 so near the margins; awn 2 to 3 mm. 

 long. % — Dry or sandy ground 

 and open woods, Maine to Minnesota 

 and South Dakota, south to western 

 Maryland and Iowa. Called wild 

 chess. 



26. Bromus fronddsus (Shear) 

 Woot. and Standi. (Fig. 25.) Culms 

 erect to weakly reclining, 80 to 100 

 cm. tall; sheaths glabrous or the 

 lower pilose; blades pale green, sca- 

 brous, mostly less than 5 mm. wide, 

 occasionally to 10 mm., rarely wider; 

 panicle open, drooping, the slender 

 lower branches naked below; first 

 glume 2- to 3-nerved; lemmas pubes- 

 cent all over, rarely nearly glabrous. 

 Ql (B. porteri var. frondosus Shear.) 

 — Open woods and rocky slopes, 



Figure 24. — Brotnus kalmii, X 1. (Chase I866V2, Ind.) 



25. Bromus kalmii A. Gray. (Fig. 

 24.) Culms slender, 50 to 100 cm. 

 tall, usually pubescent at and a little 

 below the nodes; sheaths usually 

 shorter than the internodes, pilose 

 or the upper glabrous; blades usually 

 sparsely pilose on both surfaces, 5 

 to 10 mm. wide; panicle rather few- 

 flowered, drooping, mostly 5 to 10 

 cm. long, the branches slender, flex- 

 uous, bearing usually 1 to 3 spike- 



Colorado, Utah, New Mexico, and 

 Arizona. 



Section 3. Br6mium Dum. 



Annuals; spikelets subcompressed; 

 glumes and lemmas compara- 

 tively broad, elliptic or oblong- 

 elliptic. Introduced, mostly from 

 Europe. 

 27. Bromus brizaeformis Fisch. 



and Mey. Rattlesnake chess. (Fig. 



