Andropogon] XXVIII, GRAMINEA, 147 
ligule short, membranous, truncate, shortly hairy; blade linear, 
flat or plicate along the prominent midrib, or subinvolute, glabrous, 
sparsely hairy on the upper face at the base and on the adjoining 
mouth of the sheath; inflorescence with glabrous peduncle 
exceeding the long narrow shortly acute sheath, false racemes 
generally 5, comprising two shortly stalked outer pairs and a 
simple central raceme, slender, weak ; rhachis-joint slightly shorter 
than the § spikelet, slender, curved, densely villous, hairs whitish, 
far exceeding the joint; sessile spikelet glabrous, lanceolate, outer 
glume 2-nerved, apex bidenticulate, back concave, margins involute 
below becoming carinate and scabridulous above the middle ; gl. IT. 
subequal, one-nerved, navicular, shortly mucronate, margins be- 
coming hyaline and ciliolate; gl. III. oblong-lanceolate, blunt, 
hyaline, enerved, edges incurved and ciliolate above ; fertile glume 
oblong, hyaline, shortly bifid, with a weak apical awn, column only 
slightly exceeding the spikelet; pale less than half the length of 
the glume, blunt; pedicel of aborted spikelets subequal to rhachis- 
joint but narrower, similarly hairy, spikelet bluish represented 
only by the linear-lanceolate acuminate outer glume. 
Culms 3 ft. 6 in. high, internode next or next but one above 
the base 6 in. long, 1 to 14 line in diameter ; cauline leaves nearly 
5 in. or less, 13 lines wide or less, becoming narrower upwards; 
ligule less than } line long; ultimate spathes 34 in. long; top of 
peduncle glabrous or minutely and sparsely pilose; inflorescence 
subfastigiately spreading 24 to 3 in. long; common peduncle of 
lateral pairs of racemes 2 to 3 lines long, pedicel of stalked branch 
a little shorter ; rhachis-joint a good 2 lines long; sessile spikelet 
22 lines or a trifle less; outer glume bluish, keel of gl. II. scabrid- 
ulous in the upper half; gl. III. scarcely 2 lines long; fertile 
glume 12 line long, awn + in. flexuose, scabridulous, pale 4 line 
long, lodicules narrowly cuneate } line, anthers (3) linear, { line 
long; ovary glabrous, styles slightly shorter than the stigmas ; 
pedicelled spikelet 1 to 14 line long, glume 1-nerved with margins 
carinulate and scabridulous except in lower third. 
Near A. eucomus Nees, but distinguished by its larger spikelets, 
constant presence of the aborted ¢ spikelet, laxer false racemes, etc. 
Houiitia.—Rather poor wooded meadows at Humpata ; April 1860. 
No. 2670. 
Var. minor Rendle var. nov. 
Culm 16 to 20 in., racemes in twos or threes, resembling 
somewhat those of A. ternatus var. africanus, 1} to 2 in. long; 
rhachis-joints and spikelets slightly shorter than in the species, 
sessile spikelets 14 to 23 lines, slightly exceeding the rhachis-joint. 
HUILLA. —Bathes duc rich pastes on the river Monino; Jan. 
1860. No. 2644. 
11. A. ternatus Nees Agrost. Bras. p. 326 (1829); Hack., dc, 
p. 424, 
Var. africanus Rendle var. nov. 
Densely czespitose; culms 6 to 12 in., unbranched, glabrous, 
