CXLII. OTlAMINEiE. 430 



male flower in its axil ; the terminal flowering one smaller, 

 tliinner, with an awn twisted at the base, and bent bade at or 

 beJow the middle; palea smaller, awnless. G-rain enclosed 

 in the slightly stiiicned glume and [niiiin.—JS'ees, I.e. p. 70- 

 JBenfh. Fl. Rougk. p. 415. 

 2 Capo species. 



13. TRISTACHYA, Nees. 



Spikelets in threes or solitary, at the ends of tlie branches 

 of a panicle, containing 1 fertile pedicellate flower, and a neu- 

 ter or male rudimentary glume. Lowest outer glume shorter, 

 mucronate. flowering glumes herbaceous ; those of the 

 barren llower 3-toothed at apex ; of the fertile bearded at 

 base, 2-fid, with a long, basally twisted awn between the lobes. 

 — Nees, I. G. p. 2G6. 



Coarse grasses, with large, hairj spikelets, somewhat resembling tliose of 

 the Live Oat {Avenafatua). — 1 or 2 Cape species. 



SUBTEIBE 3, AnDEOPOGONE^. 



IL PEROTIS, Ait. 



Spikelets 1-flowered, lanceolate, small, on minute pedicels, 

 closely placed in a simple spike. Outer glumes 2, subequal, half 

 membranous, tapering into a long, slender bristle. Flowering 

 glume and palea membranous, hyaline, either subequal or tlie 

 glume larger, lanceolate, the palea small, subulate. Grain 

 free, enclosed in the glumes. — Nees, I.e. x>. 139 ; Beiitli. I.e. p. 

 418. 



P. latifoUa, Ait., a widely-diffused tropical grass, occurs at Natal. Culm 

 slender, leafy in its lower parts ; the spike 2-4 inclies long, barren in the 

 lower parts ; leaves short and broad, spreading, taper-pointod. 



15. HEMARTHRIA, Br. 



Spikelets solitary, half-sunk in hollows of the unjointed 

 rachis of a simple spike, with 1 flowering glume, which is 

 sometimes male or neuter. Empty glumes 3 ; the lowest 

 rigid, nerved; the next boat-shaped, somewhat tliiinier but 

 rigid ; the third membranous. Flowering glume membranous ; 

 palea also membranous, but smaller and narrow. Scales mem- 

 branous, plaited, truncate, toothed, clasping the ovary. Grain 

 free. — Lodicularia, Beauv. ; Nees, I.e. p. 127. 



H. Capensis, diffused through the colony, is a marsh or water-grass, with 

 branching, leafy culms, the branches ending in simple spikes. 



IG. IMPERATA, Cyr. 

 Spikelets 1-flowered, awjiless, pedicellate, in a dense, cylin- 



