/)i(/itaria] xxviii. gramine^. 165 



barren glume 1 .', line, inner 1 i line not including the hairs which 

 exceed it ; hairs reddish or whitish, borne on the back of the 

 margin in the upper half, and in two tufts on either side of the 

 base; fertile glume l^r line, inconspicuously 3-nerved ; pale flat, 

 punctulate dorsally like the glume. Lodicides cuneate-quadrate. 



Recalls the >South African forms of Panicum commutatum Nees, 

 but is distinguished at once by its less regular binate spikes, with 

 broader strongly convex long-silky-haired spikelets. 



HriLLA. — In rich pastures at Monino ; April 18G0. No. 2676. 



1). D. angolensis Rendle sp. nov. 



Perennial (?), stem erect or with an ascending base, leafy ; 

 leaves rather broadly linear, tapering to the base and acute apex, 

 ligule membranous truncate, sheaths longer than the internodes ; 

 spikes (8) subeorymbosely f astigiate, rhachis narrow, trigonous ; 

 spikelets crowded, in groups of 4, plano-convex, softly pubescent, 

 oval, subacute. Inline long ; subsidiary glume very small, rounded, 

 barren glumes subequal, 3-nerved, fertile glume slightly sliortei-, 

 oval, abi'uptly acute, glabrous. 



Plants about 2 ft. high. Stems rather stout, flexuous. Nodes 

 glabrous ; leaf-sheaths loose, glabrous or spai'sely hairy in their 

 upper part, where they may also be subcarinate ; blades glabrous, 

 spreading, margin thickened and minutel}^ crispulate, midrib sub- 

 prominent below, 5 to 7 in. in length by 4 lines in breadth. 

 Spikelets long- and short-stalked, often viviparous. Subsidiary 

 glume thin and translucent; barren glumes li line long, oval,, 

 nai-rowing above to a subacute tip, covered with long ascending 

 whitish hairs, the lower concave, the upper flattened dorsally with 

 sides incurved at the lateral nerves ; fertile glume, just over a 

 line in length, very concave with strongly incurved edges, in- 

 conspicuously 3-nerved ; pale similar but flatter and slightly 

 narrower. 



Prx(;() Andoxgo. — Damp meadows near Sansamanda ; Feb. 1857. 

 No. 2790. 



10. D. nitens Rendle sp. nov. 



Perennial, cfespitose, with a densely woolly base; stems and 

 leaves erect, leaves rigid, nai-row- linear, sharply pointed ; panicle 

 elongated,branchesfiliform,ascending;spikelets, Inline, lanceolate, 

 outer glumes covered with silvery-white hairs ; subsidiary glume 

 absent ; lower barren glume triangular, ^ the length of the upper 

 and of the fertile glume ; upper barren glume lanceolate, 5-nerved ; 

 fertile glume ovate, 3-nerved. 



The short rhizome and withered bases of leaf -sheaths covered 

 with soft densely matted woolly hairs ; roots wiry. Shoots of 

 present season 20 to 27 in. long, unbranched, leafy to above the 

 middle, internodes polished, slender ; nodes glabrous. Leaf-blades 

 finely striate with scabridulous margins, ending in long sharp 

 points, at the base of the stem often pilose, above glabrous, 

 generally 3 to 6 in. long by 1 to li line broad ; sheaths loose, 

 shorter or longer than the internodes ; ligule membranous, short, 



