470 POACE^. 



wide, those of the culm 3-4, and shorter; ligiile a ciliate ring. 

 Panicle slightly exserted, dense, slightly interrujoted, 9-14 cm. 

 long, 7-14 diam. Spikelets pale or tinged with purple, oblong or 

 ovate, 7-10-flowered, 4.5-5.5 mm. long; empty glumes broad, 

 ovate, acute, 1-nerved, first 2.5-4 mm. long, second a little longer; 

 floral glume nearly smooth, broad oval, mostly mucronate, 3-3.5 

 mm. long; palea ovate, obcuneate before spreading, 2.5-3 mm. 

 long, margins broad and infolded. 



Texas, Beverclion, NeaUey for U. S. Dept. Agricul., Jenny. 



13. S. acuminata (Munro) Kuntze 1. c. Tricuspis acuminata 

 Munro, A. Gray, Proc. Acad. Sc. Phila. 335 (18G3). Triodia acu- 

 minata Benth. Vasey, Gr. U. S. 35 (1885). 



A slender erect tufted glaucous grass, 15-20 cm. high, nodes 

 smooth. Leaves of sterile shoots numerous, curved, conduplicate,^ 

 3-8 cm. long, 1.5-2 mm. wide, a2Dex obtuse, not recurved, those of 

 the culm 2; ligule a ciliate ring, all blades with light-colored mid- 

 nerves and a similar one on each margin, the width very uniform 

 throughout. Panicle much exserted, very simple, dense, oblong, 

 1.5-2.5 cm, long. Spikelets whitish or purplish, ovate-lanceolate, 

 8-]0-flowered, 9-11 mm. long; empty glumes subequal, linear- 

 lanceolate, 4.5-5 mm. long; floral glnme with keel pubescent near 

 the base and lateral nerves throughout, ovate-lanceolate, acute or 2- 

 toothed, 5 mm, long, the awn 0.5-1.5 mm. long; palea oval or 

 spatulate, ciliate on the keels, 3.5-4 mm. long. 



Texas, Beverclion for U. S. Dept. Agricul, 534, Hall 779, 

 Lindheimer 738; Arizona (Hackberry), Jones, Primjle in 1884; 

 Mexico, Pringle 406. 



Very nearly allied to S. avenacea (H, B. K,), and perliaps one 

 should be considered a variety of the other. 



14, S. Nealleyi (Vasey) L. H. Dewey, Coult. Contrib. U. S. 

 Xat. Herb, 2:538 (1894). Triodia Malleyi Ya&ej, Bull. Torr. 

 Club, 15:49 (1888), 



A slender erect tufted glaucous perennial, 30-40 cm. high, nodes 

 villous. Leaves of sterile shoots numerous, recurved, condujilicate, 

 5-8 cm, long, 2.5 cm. wide, apex obtuse, recurved, those of the 

 culm 3; ligule a brown ciliate callous ring; all leaves Avith a con- 



