45 



24. BROMUS L^VIPES n. sp. (Fig. 2.5.) 



A perennial, ^prcadbuj xottiewhat hii rooLitucks^ with an erect or somewhat geniculate 

 culm about 7-10 cm. tall, puberulent just below the nodes. Sheaths glabrous; 

 ligule 3-4 iiiiii- Joi'!/, truncate, entire or somewhat lacerate-dentate ; blades linear- 

 lanceolate, (jkthmuK or dighily scahroiin, about 1-5-20 cm. long and 4-7 mm. 1)road. 

 Panicle broad, lax, drooping, about 15-20 cm. long, lower branches 2-4. Spike- 

 lets drooping, narrow, terete, acuminate at first, 5-9-flowered, 2.5-3.5 cm. long; 

 empty glumes smooth, the lower acute, 3-nerved, 6-8 mm. Jong; the upper 

 5-nerved, broader, 9-11 mm. long; flowering glume obtuse, 7-nerved, 13-15 mm. 

 long, densely ci Hate-pubes- 

 cent on the margin nearly to 

 the apex and also on the bacJc 

 at the base; apex hyaline, 

 emarginate,usually brown- 

 ish yellow; awn straight, 

 3-4 or rarely 5 mm . long ; 

 palea about 2 n:im. shorter 

 than its glume. 



Type No. 178, collected by W. 

 N. Suksdorf on the Colum- 

 bia River, West Klickitat 

 Co., Washington. 



General distribution : Mostly 

 in the Coast Range and 

 Cascade Mountains, Cali- 

 fornia, north to Washing- 

 ton. 



Specimens examined. — Califor- 

 nia: Hood's Peak (Bioletti 

 112) ; Black Mt. (C. Rut- 

 ter 1) ; San Jose (Miss 

 Bush) ; Borax Lake (J. 

 Torrey 574 — a poor speci- 

 men, somewhat doul)tful) ; 

 Pitt River, Shasta Co. (H. 

 E. Brown 279) ; Head of 

 Russian R i ^• e r ( J . W . 

 Blankinship 41) ; Agricul- 

 tural Station, Amador Co. 

 (Geo. Hansen 610) ; no 

 locality (G. R. Vasey) . 

 Oregon: Grant's Pass (T. 

 Howell 250) . 



This species is closely related 

 to B. r(dgaris,B. orcutiianns 

 and B. richardsoni pallidus. 



From the first it is distinguished by its smooth leaves and sheaths and much 

 stouter haliit, as well as broader spikelets and denser pubescence of the flowering 

 glume. From the second it differs in the larger drooping panicle and different 

 distribution of pubescence on the flowering glume. It appears closest to the 

 third, 7>. richardsoni pallidus, into which it probably intergrades. It differs in 

 its typical form from that in its much more robust ha hit and more pubescent 

 flowering glumes ; also in its geniculate base and the production of a rootstock- 



Fig. 25. — Bromw brvipcg: a, (.■iiiply glumes with t\v( 

 b, dorsal view of a flowering glume. 



florets; 



