43 



22a. BROMUS ORCUTTIANUS GRANDIS a. var. 



A stout, erect perennial 14-15 dm. high, very leafy below. Sheaths, leaves, and 

 cuhn pubescent tlirouLrhout. Panicle alxmt 2 dm. long and nearly as broad at 

 base at maturity when the l)ranches are sjiread more or less horizontally. Spike- 

 lets pn1)escent throughout. Its distinguishing characters are its size and })ubes- 

 cence. In other respects the j^lant is like the species. 



Ty]ie Xo. 472, collected by C. R. Orcutt at La Maite, San Diego, California. 



The only specimen seen. 



23. BROMUS VULGARIS (Hook) n. comb. (Fig. 24.) 



B. jntrfjditx rdU/arif! Hook. Fl. 

 Bor. Am. 2 : 252. 1840. 

 B. (h'hili.'< Nutt. in Herb. 

 Aca.l. Nat. Sci. Phil. B. 

 ciUa{ii><i)<niciforui< Vasey in 

 Beal (Irass. X. A. 2 : 019. 

 189(i. Not Schum. imr 

 Willd. B. ciliaiusUf/nhttiis 

 Yas. in Macoun Cat. Can. 

 PL 4:288. 1888. Nomen 

 nudum. 



A slender, erect jierennial 8 to 

 11 <lni. high, with narrow, 

 pale green, sparingly jiilow 

 lea ves a ndfetv-flou'ered, nod- 

 ding panicle, 8 to 12 cm. 

 long. Culms somewhat 

 pubescent, at least below 

 the nodes, nodes beardeil, 

 the short hairs directe<l 

 downward. S he a t h s 



pilu!<e, loirer ones irhich 

 are usualhj purjiUsh, fjuite 

 denseji/ so, vith sj)readin<j 

 or rejfc.red hairs; ligule 

 membranous or snhhyaline, 

 truncate, lacerate, 3-5 nun. 

 long; blades 15-25 cm. 

 long, 5-9 mm. wide, thinly 

 pilose above, glabrous or 

 sparsely pilose beneath, 

 sparingly scabrous on the 

 margins and on the nerves 

 below. Spikelets about 

 22-28 nun. long, including 

 awns, 3-4 mm. wide; pedi- 

 cels somewhat enlarged just below the spikelet and pubescent; empty glumes 

 ^nnicirhdt sparschj covered iritli a short, coarse pubescence, lower glume narrow- 

 lanceolate, very acute, 5-8 mm. long, 1-nerved; upper iihime o-nerved, much broader 

 and longer than tlie first, obtuse or subacute and often bifid at tlie apex, the midnerre 

 excurrent as a short aim, scabrous on the back, the nerves usually purplish; flow- 

 ering glume about 8-10 mm. long, sparsely pubescent over the back, subciliate near the 

 )nargins, 5-nerved, the 3 nerves nuich more prominent than the intermediate 



Fig. 24. — Bromiis rulgaris: a, showing empt/ glumes ; /), partial 

 ventral view nf a floret showing the palet and a joint of the 

 racliilla. 



