330 CLVi. CYPERACE^ (clarke). \Cyperus. 



28. C. difformisy Linn. Amcen. Acad. iv. 302. Annual, glabrous, 

 slender or medium-sized. Stems 4-20 in. long, tufted, at the top trique- 

 trous. Leaves J-f 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, V-| by 2V-2V ^^-> compressed but somewhat turgid, 10-30- 

 flowered. Glumes close-packed, concave, very obtuse, tip usually 

 scarious. Stamen 1, rarely 2; anther small, oblong, hardly exserted. 

 Style much shorter than the nut ; branches 3, linear, short. Nut 

 nearly as long as the glume, trigonous, ellipsoid, very little narrowed 

 at the base, smooth, straw-coloured, finally brown. — Sp. PI. ed. ii. (57 ; 

 Kunth, Enum. ii. 38 ; Benth. in Hook. Niger Fl. 550 ; Boeck. in 

 Linnaea, XXXV. 586, and in Flora, 1879, 550; Oliver in Trans. Linn. 

 See. 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, ^nd in Dyer, Fl. Cap. vii. 170 ; Ridley in Trans. Linn. 

 Soc. ser. a. Bot. ii. 137; K. Schum. in Engl. Pfl. Ost-Afr. C. 120; 

 Durand & Schinz, Etudes Fl. Congo, i. 285 ; Rendle in Oat. Afr. PL 

 Welw. ii. 115. C. protr actus, Roem. k Schultes, Syst. Veg. ii. Mant. 

 102 ; Zarb, Oat. Spec. Bot. Pfund, 39. 



Upper Guinea. Senegambia, Heudelot, 213 ! 326 ! Senegal, Leprietir ! 

 Sierra Leone : Falaba, Scott-Elliot, 5158 ! Niger j Baikie I Cameroons : Yaunde, 

 Zenlcer, 1513 ! 



Wile I.and. Darfur : Er Rahad, Pfund, 614 (ex Zarh). British Bust 

 Africa : Jur ; Jur Ghattas, Schweinfurth, 2473 ! Niamniam, Schweinfurth, 3066 ! 

 Upper Nile; Madi, SpeJce Sf Grant! Albert Nyanza, 2500 ft., Stuhlmann, 2872! 

 Ukamba, Qregory, 103! Rabui Hills, near Mombasa, Taylor! 



Xiower Guinea. Island of St. Thomas, Don ! Lower Congo : Kisantu, 

 Qillet, 367 ! 989 ! 1398 ! among the rocks of Ntarao, near Stanley Pool, Hens, B, 

 5! 6! and without precise locality, Smith, 13! Angola : Barra do Dande; banks 

 of a lake near Bombo, Welwitsch, 7027 ! Mossamedes ; on the banks of the River 

 Bero, 1000 ft., Welwitsch, 6853 ! 6883 ! Lo^mda ; near Forte de Concei^ao, very 

 rare, 1000 ft., Welwitsch, 7065 ! Ambaca ; by Lake Canguele-Canganga, and banks 

 of the River Caringa, Welwitsch, 7066 ! Golnnjjo Alto ; on the islands of the river 

 near Banza de Bango, very rare, Wehoitsch, 7067 ! Pungo Andongo ; between Condo 

 and Calemba Islands, 3500 ft., Welwitsch, 6933 ! marshy places at Luxillo, Welwitsch, 

 6934 ! Dammai-aland, JEen ! 



BKozamb. 3>lst. British Central Africa : Boruma, on the Zambesi, Menyharth, 

 672 partly! 1062! Nyasaland : i:iei)hant Marsh, below Mbewe, /Sco^^ .' and without 

 precise locality, Whyte, 84 ! 



General in the tropics and warm temperate regions of the Old World ; extending 

 through Polynesia to the Philippines. 



Also twice received from Mexico. 



29. C. microlepisy Boeck. in Flora, 1879, 551. Stems slender, 

 at the top trigonous, not triquetrous. Spikelets whitish. Glumes 

 more elongate and less truncate than in C. difformis^ Linn. Nut 

 more elongate and narrower than in C. difformis^ Linn. ; otherwise as 

 C. difformis, Linn. — 0. B. Clarke in Journ. Linn. Soo. xxi. 137, and in 



