56 THE TRUE GRASSES. 



Species six, in East Indies. 



26. (80) Apocopis Nees (Amblyachyrum Hochst.). 

 Racemes in pairs (often having the appearance of being 

 single). Spikelets crowded, the lowest sessile, & , aAvu- 

 less, the upper $ , awned. Stamens two. Delicate, low 

 grasses. 



Species three or four, in East India, China, and the 

 islands of the Malayan Archipelago. 



27. Lophopogon Hack. Spikes in pairs, appressed to- 

 gether, clothed with shining, rusty-brown hairs ; spikelets 

 crowded. (Characters in the key.) A low, delicate 

 grass with narrow leaves. 



Species one (L. tridentatus Hack.), in western India. 



28. (98) Apluda L. Racemes minute, enclosed in the 

 sheaths, fascicled ; fascicles in false panicles interspersed 

 with numerous leaves. Callus of the sessile spikelets 

 spherical, both the other spikelets (one $ and one rudi- 

 mentary) upon broad, flat pedicels. 



Species one (A. varia Hack.), Avith many varieties 

 (spikelets awned or awnless), in East Indies, China, and 

 Australia. 



5 SUB-TRIBE Euandropogoneae. 



29. (92) Trachypogon Nees. The long, pedicellate 

 spikelet of every pair $ , with a long stout awn ; the $ 

 spikelet subsessile, awnless. Racemes solitary or two 

 or three together, often clothed with silky hairs. 



Species one ( T. polymorphm Hack.), in tropical and 

 subtropical America, Southern Africa, and Madagascar. 



30. (83) Elionurus Humb. & Bonpl. Axis of the soli- 

 tary raceme obliquely articulate, densely hairy. First 

 empty glume bifid or two-lobed, fringed ; spikelets with 

 a strong balsam-like odor when fresh or after soaking in 

 water, and burning the tongue when chewed. [Two 

 species within the limits of the United States, viz., E. 

 tripsacoides H.B.K. (Rottbcettia ciliata Nutt.) and E. bar- 

 biculmis Hack. (Wright, No. 2106).] 



Species fifteen, mostly in tropical and subtropical 

 America, some in Africa, western India, and Aus- 

 tralia. Savanna grasses, rejected by cattle. (The 



