f)46 POACEiB. 



interrupted, 5-20 cm. long, rays in pairs, the longest 3-4 cnn. long, 

 densely flowered on the upper half; in a very long panicle, the 

 lowest rays 5-7 cm. from the next ahove. Spikelets oval or ovate- 

 lanceolate, 3-0-flowered, 5-7 mm. long, Joint of rachilla 0.7 mm. 

 long; empty glumes 3-nerved, first ovate-lanceolate, 3.5-3.5 mm. 

 long, second oval-lanceolate, 3-4 mm. long; floral glume oval, acute 

 or obtuse, notched at the apex, 3-3.5 mm. long, the nerve on each 

 side next the midnerve obscure, webby hairs at base often 4 mm. 

 long, hairs on the keel for threo-fourths of its length and half the 

 length of the glume on the lateral nerves, 0.7 nun. long; i)aloa 

 lanceolate, 2.7 mm. long, pubescent on the keels. Certainly a good 

 species. 



Texas, Ciirtisfi 3477a irom Eeverchon, Feiidler 03; New Mexico, 

 Vaseij for IT. S. Dept. Agricul. G35; Arizona (Santa Cataliua 

 Mountains), Prinyh 458. 



Texas to Arizona. 



27. P. coMi'iiEssA L. Sp. PI. 69 (1753). Klat-stemmkd Poa. 

 Bluk Grass. AV^irixjkass. P. aiiceps Presl, ('v[). iS: Gram. Sic. 

 43 (1S2C)). P. comphnala Scluir, Euum. PI. Transs. 770 (KSdli). 

 P. L(i)u/eaiin Reichb. Fl. Gci-m. Excurs. 140* (1833). /'. ninraUs 

 Wihfl, Prim. Fl. Werth. 114. P. po///)wda. Parn. (Irass. Scot!. 

 84 (1842). /*. snIx'ONipres.sa Parn. 1. c. 



Glaucous, bluish green, culms 30-()0 cm. high, smooth, firm, 

 miu'li compressed, ascciuling from crec})ing rootstocks. Sheaths 

 mostly much shorter than the internodes, ligiih! ()l)tusi', about 1 

 mm. long; sterile shoots few, those of the culm 4. blades tlat or 

 condui)licate. -1-10 cm. long, 3-4 mm. wide, the apex abrujitly 

 pointed as in /'. annua. Panicle usually contracted, linear or open 

 und ovoid, secund, 5-10 cm. long, lower rays scabrous, in ])airs or 

 single, the middle ones in tlii-ees or fours, the longest 3-4 cm. long, 

 ilower-bearing on tlie outer half. Spikelets subsessile, oval or ovati-- 

 lanceolatc, 3-10-ll()wered, 4-() mm. long, l)luish green, often tinged 

 with purple, joint of rachilla 0.5 mm. long; empty glunu'S sub- 

 equal, 3-ncrved, acute, ovate or elliptical-lanceolate, second 2.5-3 

 mm. long; iloral glunu' 2.5-3 mm. long, lirm, smooth or scabrid, 

 Webby hairs few or wanting, pubescent on the keel and lateral 



