464 POACE^. 



2.5-3.0 cm. long. Spikelets purplish, ovate-lanceolate, slightly- 

 compressed, 8-11-flowered, 9-12 mm. long; empty glumes ovate- 

 lanceolate,, rounded on the back, first 1-nerved, 4-5 mm, long, sec- 

 ond 3-nerved, 5 mm. long; floral glume ovate, awnless, pubescent 

 on the lower two-thirds of the nerves, 4.5 mm. long; palea ellipti- 

 cal, hyaline in the middle, ciliate on the keel, 3 mm. long. 



Texas, Reverclion for U. S. Dept. Agricul. 545. 



Texas to Arizona. 



2. S. Wrightsii Vasey, Contrib U. S. Nat. Herb. 1 : 269 (1893). 

 Poa Texana Vasey. 



An erect or decumbent dioecious perennial, 30-GO cm. higli, 

 from creeping rootstocks. Culms rather stout, nearly solid. Blades 

 of the sterile shoots flat or involute, 3-7 cm. long; leaves of the 

 culm 5-8, nearly smooth, sheaths shorter than the internodes, 

 loose; ligule a short fringe of hairs; blade smooth, 10-20 cm. long, 

 5 mm. wide, staminate panicle narrow, simple. 5-10 cm. long, rays 

 single. Staminate spikelets glabrous, flat, oval, 5-8-flowered, 8-11 

 mm. long; empty glumes subequal, 5 mm. long, first 1-nerved, sec- 

 ond 3-nerved; floral glume broadly ovate, 5-6 mm. long, 3- 

 nerved; palea nearly as long as its glume. Pistillate panicles 

 12-30 cm. long, rays mostly single, usually appressed. about 5 cm. 

 long, bearing 6-8 nearly sessile spikelets on the outer three-fourths. 

 Spikelets compact, nearly terete, 5-7-flowered, 12-20 mm. long; 

 empty glumes ovate-lanceolate, membranous, first 3-nerved, 6 mm. 

 long, second 3-5-nerved, 7-10 mm. long; floral glume ovate, acute, 

 often mucronate, 7-10 mm. long, 5-nerved, coriaceous with scarious 

 margins; palea but little shorter than its glume, broad and coria- 

 ceous at the base. Styles 10 mm. long and protruding. 



Texas (Presidio County), Nealley 136, 137. Dr. Vasey says: 

 "It was first collected in Texas or New Mexico by C. Wright 

 (2038) and was distributed as Tricuspis albescens Munro, from 

 which it is very different." 



Some doubt exists as to its affinity, but I prefer not to attempt 

 a change at present. 



3. S. stricta (Nutt. Kuntze, Rev. Gen. PL 2 : 789(1891). Wind- 

 sarin stricta Nutt. Gen. 70 (1818). Tricuspis stricta Thurb. MS. 



