368 
FLORA OF ADEN. 
spikelets ellipsoid, obtuse, about 1 line long, light green, glabrous ; lower 
glume hyaline, broad, ovate, acute, 1- to sub-3-nerved, J-|- as long as 
the spikelet, upper membranous, elliptic, concave, 5-7-nerved, equal to 
the spikelet or almost so ; lower floret barren ; valve similar to the upper 
glume, dorsally flattened, 5-7-nerved, pale hyaline, more or less arrested 
or 0 ; hermaphrodite floret elliptic-oblong, plani-convex, subapiculate 
or obtuse, almost 1 line long, greenish or straw-coloured ; valve subcoria- 
ceous, very obscurely wrinkled, 5 -nerved, anthers f line long. 
Grain troadly ellipsoid, over J line long, white, subtranslucent. 
Locality'. — Aden (Birdw.) s 
Distribution Throughout Africa and India to Malaya, elsewhere 
(Europe, Australia, America) only as a weed. 
4> 
4. Tricliolflena Schrad. 
Erect tufted perennial (rarely annual) grasses. Leaves narrow ; 
ligule a fringe of hairs. Spikelets oblong, laterally compressed, more or 
less gaping, panicled, deciduous from capillary pedicels ; lower floret 
usually male or barren, upper hermaphrodite. Glumes very dissimilar or 
at least unequal, lower reduced to a minute scale or obsolete, very rarely 
half the length of the spikelet, somewhat remote from the upper ; 
upper glume membranous, emarginate, muticous or finely mucronate 
or aristate from the sinus, 5-nerved, usually hairy. Valves very dis- 
similar, lower like the upper glume with a hyaline 2-nerved subequal 
pale, upper much smaller, thinly chartaceous, glabrous, shining, obtuse 
or submarginate, obscurely 5-nerved with an equal 2-nerved pale of 
similar substance. Lodicules 2, very small. Stamens 3. Style free, 
slender ; stigma densely plumose, laterally exserted. 
Grain oblong-ellipsoid, closely embraced by the valve and pale ; 
hilum basal, punctiform ; embryo about \ the length of the grain. 
Species about 12. 
Distribution : — In the dry and hot countries of the Old World, 
chiefly African. 
Tricholaeiia Teneriffse Parlat. in Webb et Berth. Phyt. Canar. Ill, 
part 2 (1848) p. 425, FJ. Ital. I., 30 ; Anders. Journ. Linn. Soc. V, 
Suppl. p. 38 ; Boiss. FI. Or. V, 434 ; llook. FI. Brit. Ind. VII, 65 ; Cooke 
FI. Bomb. Pres. II, 924. 
Tricholsena micrantha Schrad. in Sch. Mant. II, 163 ; Nees in 
Ann. Sc. Nat. ser. 2, VI (1836) 106. 
Panicum plumoSum Presl FI. Sic. I, 43. 
Panicum saccliaroides Trim Gram. Panic. 245. 
