DESCRIPTIONS OF TRIBES AND GENERA. 



153 



or sharp points. T. cuprea Jacq., a showy grass with 

 open panicles [common in the Eastern United States]. 



Sec. V. Triplasis Beauv. (as a genus), {Uralepis Nutt., 

 Diplocea Raf.). Flowering glumes three-cleft, the middle 

 division recurved and awn-like. North America. 



219^, Redfieldia Vasey. 

 Florets crowded, the short 

 joints of the rachilla smooth. 

 Flowering glumes charta- 

 ceous, densely hairy on the 

 callus only, 3- nerved, indis- 

 tinctly 3-toothed or terminat- 

 ing in a short mucronate point. 

 Styles long ; stigmas short. 

 Grain oblong, terete, free. 



Species one (R. fiexuosa 

 Vasey, Graphephorum (?)flexu- 

 osum Thurber), (Fig. 78) in the 

 Western United States. 



220. (202) Diplachne Beauv. 

 Spikelets narrow, many- 

 flowered ; flowering glumes 

 1-nerved, keeled, usually 

 2-toothed, the teeth mucronate or awn-pointed ; fruit 

 3-angled, unfurrowed. 



Species fifteen, in the warmer countries of both hemi- 

 spheres. Leptocarydion Hochst. and Trichoneura Anders- 

 son include species that form a transition to Triodia. 



Fig. 78. — Redfieldia fiexuosa Vasey. 

 B, Spikelet. a, A single floret show- 

 ing joint of rachilla, etc. a', A single 

 floret from a one-flowered spikelet, 

 with a rudiment of a second floret 

 above, b, Apex of flowering glume. 

 E, Palea. F, Flower. (Original.) 



Sub-tribe E. — Eragrosteae. 



Flowering glumes three nerved, awn less or short-awned. 



221. (226) Dissanthelmm Trin. (Phalaridium Nees, 

 Stenochloa Nutt.). Panicle narrow ; flowering glumes 

 broad, obtuse, awnless, 3-nerved, the lateral nerves 

 nearly marginal. 



Species three, of low habit, one in California, the 

 others upon the Andes of South America and coasts of 

 Mexico. 



222. (227) Molinia Schrank {Enodium Gaud.). Pani 



