CXLII. GRAMINES. 439 
male flower in its axil; the terminal flowering one smaller, 
thinner, with an awn twisted at the base, and bent back at or 
below the middle; palea smaller, awnless. Grain enclosed 
in the slightly stiffened glume and palea.—Wees, l.c. p. 79 ; 
Benth. Fl. Hongk. p. 415. 
2 Cape species. 
13. TRISTACHYA, Nees. 
Spikelets in threes or solitary, at the ends of the branches 
of a panicle, containing 1 fertile pedicellate flower, and a neu- 
ter or male rudimentary glume. Lowest outer glume shorter, 
mucronate. lowering glumes herbaceous; those of the 
barren flower 3-toothed at apex; of the fertile bearded at 
base, 2-fid, with a long, basally twisted awn between the lobes. 
—Nees, l.c. p. 266. 
Coarse grasses, with large, hairy spikelets, somewhat resembling those of 
the Live Oat (Avena fatua).—1 or 2 Cape species. 
SUBTRIBE 8. ANDROPOGONER. 
14. 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 the 
glume larger, lanceolate, the palea small, subulate. Grain 
free, enclosed in the glumes.—Wees, 1.c. p. 1389; Benth. l.c. p. 
418. 
P. latifolia, Ait., a widely-diffused tropical grass, occurs at Natal. Culm 
slender, leafy in its lower parts; the spike 2-4 inches long, barren in the 
lower parts; leaves short and broad, spreading, taper-pointed. 
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 thinner 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, l.c. p. 127. 
H. Capensis, diffused through the colony, is a marsh or water-grass, with 
branching, leafy culms, the branches ending in simple spikes. 
16. IMPERATA, Cyr. 
Spikelets 1-flowered, awnless, pedicellate, in a dense, cylin- 
