330 CLVI. CYPERACEE (CLARKE). [ Cyperus. 
28. C. difformis, Linn. Amen. Acad. iv. 302. Annual, glabrous, 
slender or medium-sized. Stems 4—20 in. long, tufted, at the top trique- 
trous. Leaves }—# the length of the stem, }-} in. broad. Spikes in a 
simple or compound umbel, or contracted into 1 head ; bracts 2—4, lowest 
2-10 in. long, similar to the leaves. Spikelets many in dense heads, dusky 
or brown, }~3 by 34,—,1, in., compressed but somewhat turgid, 10-30- 
flowered. Glumes close-packed, concave, very obtuse, tip usually 
scarious. Stamen 1, rarely 2; anther small, oblong, bardly exserted. 
Style much shorter than the nut; branches 3, linear, short. ob 
nearly as long as the glume, trigonous, ellipsoid, very little narrowed 
at the base, smooth, straw-coloured, finally brown.—Sp. Pi. ed. il. 67; 
Kunth, Enum. ii. 38; Benth. in Hook. Niger Fl. 550; Boeck. in 
Linnea, xxxv. 586, and in Flora, 1879, 550; Oliver in Trans. Linn. 
Soc. xxix. 165; C. B. Clarke in Hook. f, Fl. Brit. Ind. vi. 599, in 
Durand & Schinz, Conspect. Fl. Afr. v. 556, in Bull. Herb. Boiss. iv. 
Append. iii. 29, and in Dyer, Fl. Cap. vii. 170 ; Ridley in Trans. ne 
Soc. ser. 2, Bot. ii. 137; K. Schum. in Engl. Pf. Ost-Afr. C. 12¢ A 
Durand & Schinz, Etudes Fl. Congo, i. 285; Rendle in Cat. Afr, Pl. 
Welw. ii. 115. C. protractus, Roem. & Schultes, Syst. Veg. ii. Mant. 
102; Zarb, Cat. Spéc. Bot. Pfund, 39. 
Upper Guinea. Senegambia, Heudelot, 213! 326! Senegal, Leprieur! 
Sierra Leone : Falaba, Scott-Elliot, 5158! Niger ; Baikie! Cameroons: Yaunde, 
Zenker, 1513! 
Wile Land. Darfur: Er Rahad, Pfund, 614 (ex Zarb). British ery 
Africa : Jur; Jur Ghattas, Schweinfurth, 2473! Niamniam, Schweinfurth, peta 
Upper Nile; Madi, Speke § Grant! Albert Nyanza, 2500 ft., Stuhlmann, 2872! 
Ukamba, Gregory, 103! Rabai Hills, near Mombasa, Taylor! 
Lower Guinea. Island of St, Thomas, Don! Lower Congo: cn 
Gillet, 367! 989! 1398! among the rocks of Ntamo, near Stanley Pool, Hens, 7 
5! 6! and without precise locality, Smith, 13! Angola : Barra do Dande ; ban S 
of a lake near Bombo, Welwitsch, 7027! Mossamedes; on the banks of the River 
Bero, 1000 ft., Welwitsch, 6853! 6883! Loanda 3; near Forte de Conceigao, Mat 
rare, 1000 ft., Welwitsch, 7065! Ambaca ; by Lake Canguele-Canganga, and banks 
of the River Caringa, Welwitsch, 7066 ! Golungo Alto; on the islands of the wee 
near Banza de Bango, very rare, Welwitsch, 7067 ! Pungo Andongo ; between Con od 
and Calemba Islands, 3500 ft., Welwitsch, 6933! marshy places at Luxillo, Welwitsch, 
6934! Dammaraland, Een! 
Mozamb. Dist. British Central Africa: Boruma, on the Zambesi, eryres oe 
672 partly! 1662! Nyasaland: Elephant Marsh, below Mbewe, Scoté ! and witho 
precise locality, Whyte, 84! : 
General in the tropies and warm temperate regions of the Old World; extending 
through Polynesia to the Philippines. 
Also twice received from Mexico. 
29. C. microlepis, Boeck. in Flora, 1879, 551. Stems pesca 
at the top trigonous, not triquetrous. Spikelets whitish. Nut 
more elongate and less truncate than in @. diformis, Linn. seo 'ak 
more elongate and narrower than in C. difformis, Linn. 3 otherw! in 
C. diformis, Linn.—O. B. Clarke in Journ. Linn. Soe. xxi. 137, an 
