348 CLVI. CYPERACEE (CLARKE). [ Cyperus. 
Lower Guinea. Angola: Loando; near Cabo Lombo, Welwitsch, 7021! 7045! 
ponds near Cumano, Welwitsch, 7026! Mossamedes ; damp places at the public 
garden, near Mossamedes, Welwitsch, 6884 ! 
Mozamb. Dist. Zanzibar, Hildebrandt, 1072! Schmidt, 64! German East 
Africa: Zanguebar, Kirk! Usambara; Amboni, Holst, 2583! Portuguese Kast 
Africa: Quilimane, Zimmermann! Zambesi Delta; Luabo River, Kirk ! British 
‘Central Africa: Boruma, on the Zamtesi, Menyharth, 583! 
And in nearly all tropical and subtropical countries. 
66. C. incompressus, (’. 8. Clarke. Annual, glabrous. Stems 
12-18 in. long, tufted, triquetrous, almost 3-winged. Leaves 3 the 
length of the stem, } in. broad. Umbel in appearance simple, of 3-9 
very unequal rays, lower up to 8 in. long; bracts 3-4, similar to the 
leaves, lowest about as long as the umbel. Spikelets 3—» together, 
shortly spicate, up to 1 by } in., moderately flattened, 16—24-flowered, 
pallid, tinged with rose. Glumes concave, obtuse, obscurely keeled, 
somewhat inflated, 3-nerved on the back; rhachilla not winged. 
Stamens 3; anthers shortly oblong. Nut 4 the length of the glume, 
-obovoid, acutely triquetrous; style shorter than the nut; branches », 
little exserted. ; 
Upper Guinea. Sierra Leone: in swamps near Kambia, on the River Scarcies, 
Scott-Elliot, 4373 ! 
This has been distributed as C. compressus, Linn. ; the obtuse round-backed 
glumes are very different. 
67. C. aristatus, Rotth. Descr. et Ic. 23, t. 6, fig. 1. Annual, 
glabrous. Stems 1-7 in. long, tufted. Leaves often as long as the 
stem, ;}, in. broad. Umbel appearing simple (or of 1 spike) ; rays 1-6, 
up to 3 in. long; bracts similar to the leaves, lowest usually over- 
topping the umbel. Spikes $ by } in., cylindric or subovoid, dense, of 
5-40 spikelets, finally brown, spreading. Spikelets $ by ¢ 1. (or 
usually smaller), compressed, 6—30-flowered; rhachilla not winge™ 
‘Glumes ovate-lanceolate, 7—9-striate over nearly their whole breadth, 
keel excurrent into a conspicuous recurved bristle. Stamen 1. Nut ¢ 
the length of the glume (mucro included), oblong or narrowly obovoid, 
dusky brown; style shorter than the nut ; branches 3, shortly exserted:. 
—Schumach. Beskr. Guin. Pl. 39; Kunth, Enum. ii. 23; Steud. 
Flora, 1842, 585; A. Rich. Tent. Fl. Abyss. ii. 478; Benth. in_ Hook. 
Niger Fl. 549; Boeck. in Linnea, xxxv. 500, and in Flora, 1879, sae 
(excl. the syn. C. hamulosus, M. Bieb.); T. Thoms. in Speke, Nile, 
Append. 653; Oliver in Trans. Linn. Soc. xxix. 164; Schweinf. Beitr. 
Fl. Aethiop. 215; Ridley in Trans. Linn. Soc. ser. 2, Bot. 130; 
©. B. Clarke in Hook. f. Fl. Brit. Ind. vi. 606, in Durand & —_— 
Conspect. Fl. Afr. v. 548, in Bull. Herb. Boiss. iv. Append. Ml *% 
and in Dyer, Fl. Cap. vii. 179; Schweinf. in Bull. Herb. ea 
Append ii. 46; Ficalho & Hiern in Trans. Linn. Soe. ser. 2, Bot. 11. ‘ : 
K. Schum. in Engl. Pf. Ost-Afr. C. 118; Rendle in Cat. Afr. Pl. We vf 
ii. 110. CO. squarrosus, Linn. Ameen. Acad. iv. 303, and Sp. Pe 
-66 partly. Dichostylis aristata, Palla in Engl. Jahrb. x. 296 
