62 



are slightly l)roadpr, irhiiiit's not so acute, and awn somewhat stouter an<l shorter, 

 5-7 nun. long. 

 Type in the herbarium of the Department of Agriculture collecteil by Dr. G. R. A'asey 

 in California in ISTo. 



35 f. BROMTJS CARINATUS ARIZONICUS n. var. 



Sheaths and knaves more scantily pilo.se than in the species. Panicle erect, narrow 

 pyramidal to sul»raceinose, spikelets and glumes slightly Ijroader than in the 

 species, empty glumes glabrous; flowering glumes sparsely scabrous-puhentlent , less 



acute; aim nlmrtcr, '>-<] mm. 

 long. 

 Type in the Herbarium U. S. 

 Department of Agricul- 

 ture, collected by C. G. 

 Pringle in Santa Cruz Val- 

 ley, Tucson, Arizona, May 

 ;'., 1884. 



Specimens ex a m i xeu. — Arizo- 

 na: fifteen miles above 

 Pierces Ferry (M.E. Jones 

 5077ar); Tucson (J. W. 

 Toumey 748,798); Brad- 

 shaw Mts. (J. W. Toumey 

 27 ) ; near Congress ( C. R. 

 Orcutt 2531). Tf.m.s.- El 

 l^iso (M.E.Jones 19a). 



This may be the Broinus hookeri 

 xclilerJifeiidalli Fourn. Mex. 

 P1.2 : 127. 1886, as it dif- 

 fers only in a few nnnor 

 particulars from the origi- 

 nal descripti(in of that va- 

 i»ety. It also closely ap- 

 proaches B. m((rginafus 

 semiiiKfhis. 



36. BROMUS LACINIA- 

 TUS Eeal, Grass. N. A. 

 2:615. 1896. (Fig. 40.) 

 An erect perennial with a lax, 

 somewhat secund panicle 

 and laterally compressed 

 purplisli spikelets. Culm 

 about 5-7 dm. high, smooth 

 or slightly ]>u))escent at 

 the nodes. Sheaths xmuutli; ligule about 2 mm. long, subtruncate, laciniate; 

 blades smooth, both sides linear-lanceolate, ascending, somewhat stiff, 5-20 cm. 

 long by 3-5 mm. broad. Panicle suberect or somewhat drooping, lax, about 

 10-17 cm. long, lower rays 3-4, slender, bearing 1-2 spikelets. Spikelets about 

 5-flowered, 2-2.5 cm. long, about 5 vnn. broad, lower somewhat drooping, later- 

 ally compressed; emi)ty glumes smooth, lower broad-lanceolate, acute, 3-nerved, 

 6-7 mm. long, upper broader, obtuse, 5-7-nerved, 8-9 mm. long; flowering glume 

 ovate-lanceolate, chartaceous, scabrous, 5-7-nerved, 11-13 mm. long, with two short 

 subacute teeth at the apex, and an awn 5-6 mm. long ; palea about equaling its 

 glume. 



Fig. 39.- 



-Hrumiia carinatus linearis: a, empty glumes with two 

 florets: b. riorsal view of a flowering glume. 



