FKSTICK.K. 471 



spicuous li;;lit-colore(l niid-nervt' and a similar oiu' on cacli niarfjin, 

 till' wiiltii of leaf nearly uniform tliroiij,'liout. i'anicle much ex- 

 Berted, dense, linear or ovoid, sliirlitly interniptcti helow, 4-") cm. 

 lon^'. Spikelets whiti-sli, tin;,'i'd more or less with purple. oltlon<;, 

 0-T-llowered. I mni. long; empty glinues oval- lanceolate, 1-iicrvcd, 

 first 4-4.') mm., second 5-r» mm. I<»ng; lloral ;.dume with keel pu- 

 bescent toward the base, and lateral nerves tlirou_:rhoiit, ovate-oval, 

 obtuse, 4 mm. long, the av.n ))rojeeting none or hut little ahovi- the 

 lohed apex of its glume; palea falcate, spattdate, ciliate on tho 

 nerves, 'i.o mm. long. Nearly allied to S. iiriindijhini. 



Texas, yvuUey for Nat. Mus., Chenate Mountains, I'residio 

 county. 



15. S. grandiflora (Vasey). Tn'odia (jrauiJIjJoni \'asey, ("on- 

 trih. r. S. Nat. Herb. 1 : T)!) (ISilO). 



A sleiuler erect or geniculate tufted glaueotts grass, tiO-SO em. 

 liigli; nodes villous. Leaves of sterile shoots numerous, recurved, 

 contluplicate. 5-8 cm. long, 2.5 mm. wide, apex obtuse, those of 

 the culm 3; ligide a brown ciliate callous ring; all blades with a 

 conspicuous light-colored mid-nerve and a similar one on each mar- 

 gin, the width of blade nearly uniform throughout. Panicle much 

 exserted, dense, linear or ovoid, 4r-6 cm. long. Spikelets whitish, 

 tinged more or less with purple, linear to oval, 4-G-llower( d, 8-10 

 mm. long: empty glumes lanceolate, 1-nerved, first 5-() mm. long, 

 second 7-8 mm. long; tloral glume with keel pubescent toward the 

 base and lateral nerves throughout, ovate-lanceolate, obtuse, 5-0 

 mm. long, the awn 0.5 to I mm. long; palea falcate-spatulate. cili- 

 ate on the nerves, nearly 4 mm. long. 



Texas, XmJh'n for Nat. Mus. ; Mexico, Prinyle 400. The latter 

 was distributed as T. aveuacca II. K., by which name this grass has 

 been known for some years. Dr. Vjisey, after comparing the draw- 

 ings of T. arenacea with the above plant, deciited that the grasses 

 are identical, hence the new name. 



Texas to Arizona ami Mexico. 



10. S. mutica (Torr.) Kuntze, 1. c. Tricuspid mntica Terr. 

 Tac. 1{. K. Hep. 4:150 (1857). 



A slender erect or rigid glaucous tufted grass, 40-70 cm. 



