146 XXVIII. GRAMINEAE. [Andropogon 
generally of 6 to 8 pairs of heterogamous spikelets and a terminal 
male; rhachis-joints shorter than the % spikelets, sparsely 
puberulous with a short tuft of whitish hairs at the base, plane of 
union clean, slightly oblique, round ; spikelets purplish, subfalcate, 
narrowly elliptical, the sessile (%) slightly shorter than the 
pedicelled (3); outer glume of sessile with narrowly keeled 
margin scabridulous above, and flattened membranous enerved 
back ; gl. II. 1-nerved, navicular, acute ; gl. ITI. hyaline, lanceolate 
blunt, enerved ; fertile glume hyaline, linear from a weak stipiti- 
form base, l-nerved, apex entire; pale absent; lodicules cuneate 
with crenate apex, almost as long as the glabrous ovary ; styles 
about 2 length of stigmas; pedicel of ¢ spikelets shorter than 
rhachis-joint, villous with short white hairs; gl. I. subacute with 
narrowly carinate scabridulous margins, back l-nerved; gl. IT. 
oval, blunt, 3-nerved, margin inrolled, back round; gl. IIT. hyaline, 
3-nerved, elliptical, blunt, margin ciliolate in the upper half ; 
fertile glume oblong-elliptical 1-nerved. 
Plants 2 to 21 ft. high; radical leaves 10 in. long or less, 
and 1} line or less in width, plicate or subconvolute, the solitary 
cauline leaf shorter often subtending a short filiform flowering 
branch. Inflorescence about 10 in. long, lower branches 33 to 
41 in., upper shorter and more crowded. Ultimate spathes + to 
1 in. long, acute; spikes generally $ to 3} in.; rhachis-joint 1 line 
long, narrowly clavate; sessile spikelet acute, 2 lines long; gl. I. 
13 to scarcely 2 lines long, keels scabridulous in the upper two- 
thirds; gl. IJ. 14 line, upper half of keel scabridulous; gl. III. 
1} line, pinkish; fertile glume 11 line. VPedicelled spikelet 2} to 
23 lines long, including pedicel ; spikelet 2 lines ; outer glume with 
keeled margin, scabridulous in the upper half to two-thirds ; gl. IT. 
1} to 1} line; gl. IIT. 14 line, pinkish ; fertile glume 13 line, 
colourless ; anthers $ line. 
Most nearly allied to the American A. spathiflorus Kunth, but 
easily distinguished by its longer narrow raceme, and larger 
spikelets. 
Hvitia.—A grass 2 to 23 ft., ceespitose, erect, rose-violet, with 
habit of a Fescue ; spikes dull-purple, rather strict. Plentiful in boggy 
and spongy places near the streams in the Humpata district ; Dec. 
1859. No. '7505. 
Suncenus IV. Arthrolophis. 
9. A. eucomus Nees, Z.c., p. 104; Hack., dc. p. 421; Durand & 
Schinz, tc. p. 711. 
Punco AnponGo.—Growing sparsely (or perhaps already over) in 
rather dry meadows near Bumba, not far from Condo; a unique 
specimen ; March 1857. No. 7442. 
10. A. huillensis Rendle sp. nov. 
Perennial, apparently cespitose ; culms geniculate rising from a 
basal leafy tuft, lower internodes long, stout, subterete, like the 
upper considerably exceeding the sheaths, nodes glabrous, long 
slender flowering branches spring from the third and higher nodes ; 
