436 POACE.E. 



spikelike. Spikelets on short pedicels, 7-11-flowered, 6-10 mm. 

 long; empty glumes 1-uerved, mucroiuite, tirst 1.5 mm. long, 

 second 3 mm. long; floral glume 3-norved, 3 mm. long, pubescent 

 on the margins along tiie lower half; palea linear, shorter, pubes- 

 cent on the margins. 



U. hi. Dept. Agricul. 54:8; Texas, Jones 4303, Nealley; Mexico, 

 Pr ingle 815. 



New England to Arizona and Mexico, often on brackish marshes. 



9. L. Tracyi (Vasey). D. Tracy i Vasey, Bull. Torr. Club, 15: 

 49 (1888). 



An erect grass, 50-90 cm. high. Sheaths smooth or nearly so; 

 ligule fringed, 3 mm. long; blades 3-5, scabrid, narrow, involute, 

 20-40 cm. long. Panicle 30-30 cm. long, rays 1-3 together, of 

 very unequal length, the longest spikelike, 10 cm. long, bearing 

 about 14 spikelets. Spikelets purple, appressed, slightly imbricate, 

 pedicels 1-3 mm. long, 8-10-flowered, 8-12 nmi. long; empty glumes 

 lanceolate or ovate-lanceolate, 1-nerved, mucronate, tirst 3 mm. long, 

 second 3-3.5 mm. long; floral glume linear, 3.5 mm. long, pubes- 

 cent on the lower half of tlie lateral nerves, each of which termi- 

 nates in a mucro; apex 3-Iobed or 3-toothed with an awn 1-3 mm. 

 long; palea linear, pubescent on tlie nerves, 3 mm. long. 



Dr. Palmer says of it: ''Found (juite abundantly in little oases 

 of thin soil on the rocks, high up the mountains where it was well 

 watered." 



Nevada, Tracy iov \J . S. Dept. Agricul. 091; Mexico, Palme'*' 

 691. 



10. L. Pringlei (Vasey). I). Prinylci Vasey ined. 



Culms 30 cm. high. Ligule a more ring bearing short hairs; 

 blades 4-5, scabrid, compressed, 3 mm, wide. Panicle little ex- 

 serted or enclosed at the base, purplish, rays simple, 5 in number, 

 sjiikelike, 4-6 cm. long. Spikelets slightly imbricate. 3-3-flowered; 

 empty glumes lanceolate, 1-nerved, tirst 3,5 mm, long, second 3 mm. 

 long; floral glume ovate-oblong, 4 nun. long, truncate oremarginate, 

 the midnerve barely extending to the base of the notch at the apex, 

 the three nerves sparingly and shortly hairy near the base; palea 3.5 

 mm, long. 



