218 XXVIII, GRAMINES. [Tristachya 
membranous, several times shorter than the much elongated 
slender terete internodes ; ligule a dense row of very short whitish 
hairs; blades convolute, setaceous, erect, shorter than the inter- 
nodes; panicle subnutant, often subumbellate, branches slender, 
wiry, flexuose, bearing 2 or 3 golden-brown spikelets which are 5 
lines long without the awn ; outer glumes equal, the length of the 
spikelet, membranous and acuminate in the upper third, the 
lower lanceolate, tuberculate and bristly on the lateral nerves, 
the upper elliptical, glabrous; gl. III. elliptic-oblong, tapering 
above to the minutely apiculate apex, 3-nerved, one or both lateral 
nerves with a few small bristle-tubercles about the middle, fertile 
gl. on a slender long-haired callus, involute, when flattened oblong 
from a truncate base narrowing at the apex, 7-nerved, awn short, 
geniculate at the base, springing between two short, triangular, 
acute, membranous auricles ; pale narrow-linear, lodicules mem- 
branous, subspathulate with triangular, dentate apex; ovary 
densely hairy above. 
Specimen 21 ft. high; lower cauline leaf 5 to 7 lines long, 
2 line in diameter. Panicle carried far above the leaves, 2 to 
22 in. long, with 6 to 9 flower-heads, common pedicels 5 to 9 
lines long, with clavate apex; outer glumes 5 lines; gl. III. 
41 line long; callus hairs below gl. IV. half the length of the 
glume, which is scarcely 33 lines long, colourless below, becoming 
golden-yellow at the apex, the three parallel median nerves 
passing into the awn-base, the lateral pairs into the auricles, 
awn. greenish-yellow, 4 in. long ; pale scarcely 3 lines. 
A very distinct little species nearest to 7’. inamoena K. Schum., 
but distinguished by habit, congested panicle, glabrous pedicels, 
and shorter awns, , 
Hurtta.—Damp meadows at Lake Ivantdla ; Feb.1860. No. 7501. 
Tripe vi. ARUNDINE A. 
45. TRICHOON Roth in Roem. Arch. Botan. i. 3, p. 37 (1798). 
Phragmites Trin. Fund, Agrost. p. 134 (1820), pro parte; 
Benth. & Hook. f. Gen. Pl. iii. p. 1179. 
1. T, Phragmites. 
Avundo Phragmites L. Sp. Pl. 81 (1753). Phragmites commun- 
is Trin., Jc.; Steud. Syn. Pl. Gram. p. 195 (1854). P. vulgaris 
Crép. Man. FI. Belg. ed. ii. p. 345 (1866); Durand & Schinz, 
Consp. Fl. Afr. v. p. 876. 
AmBaca.—A grass 6 to 10 feet high, with the habit of Arwnulv 
Donaz, densely cxespitose, glaucous green, with a woody tuberculed 
rhizome. Flowers were sought in vain. Very plentiful near streams. 
(Pamba, etc.) round Ngomba ; in fl. Oct. 1856. No. 7318. 
Punco AnDoNco.—Muta Lucala ; March 1857. No. 2802 (in part). 
In gravel on dried-up rivers. Cuanza ; Nov. 1856. No. 2802c. The 
following numbers with immature spikelets should probably be 
included. A grass 8 to 15 ft. high, culms bristling below with spiny 
sheaths. Plentiful near the banks of the river Cuanza ; Sansamanda, 
Feb. 1857. No. 2802 (in part). A very high grass, 20 ft. and more. 
