464 POACE.E. 



2.5-3.5 cm. long. Spikelets jmrplish, ovato-lanoooliite, slifjhtly 

 coinprossed, 8-1 l-llowerc(l. 9-1'^' imn. long: ('nii>ty glumes ovati'- 

 lanceoliite. rounded on the back, first l-ner\ed. 4-5 nun, long, sec- 

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

 on the loAver two-thirds of the nerves, 4.5 mm. long; palea ellii)ti- 

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



Texas. Rererrlion for U. S. Dept. Agrieul. 545. 



Texas to Arizona. 



2. S. Wrightsii Vasey, Contrib U. S. Nat. Herb. 1 : 2G9 (1803). 

 Poa Tv.rana Vasey. 



An erect or decumbent dioecious perennial, 30-00 cm. high, 

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

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

 culm 5-8, nearly smooth, sheaths shorter than the internoth-s. 

 loose; ligule a short fringe of hairs; blade sinooth, lO-'-iO 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 subcqual, 5 mm. long, first 1-nerved, sec- 

 ond 3-uerved ; floral glume broadly ovate, 5-() mm. long. 3- 

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

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

 long, l)caring 0-8 nearly sessile spikelets on the outer three-fourths. 

 Si)ikelets comjiact, nearly terete, 5-7-flowere(l, 12-20 mm. long; 

 empty glumes ovate-lanceolate, membranous, first 3-ncrved, mm, 

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

 often mucronate, 7-10 nnn. 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), XeaUeii 130, 137. Dr. Vasey says: 

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

 (2038) and was distributed as Trivuspis (tlhosrens Munro, from 

 M'hich 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, Eev. Gen. PI. 2 : 780(1801). Wiud- 

 i^nria sfricfa Nutt. Gen. 70 (1818). Trimspis stricta Thurb. MS. 



