20 CLVi. CYPERACE.E (clarke). [Pycreus. 



Umbel compound. Margins of glumes con- 

 spicuously scarious. 

 Spikelets 1 in. wide, glistening . . .33. P. alhomarginatvs. 



Spikelets yL in. wide, hardly glistening . 34. P. trenmlus. 



1. P. flavescens, Reichh. Fl. Germ. Excurs. 72. Annual. Stems 

 1-12 in. long. Leaves ^ as long as the stem, y^-J i^- Inroad. Spikes 

 loosely umbellate (or 1) ; bracts 2-4, overtopping the umbel. Spikes 

 of 3-12 clustered spikelets, ebracteolate. Spikelets J by yV in. (in the 

 form abyssinica, f by -^ in.), compressed, parallel-sided, straw-coloured 

 more or less red-tinged, each perfecting 8-o6 nuts. Glumes close- 

 placed, ovate, obtuse,''boat-shaped, inflated. Nut hardly h the length 

 of the glume, transversely white-muriculate by reason of the sub- 

 persistent ends of the small longitudinally-oblong superficial cells. — 

 C. B. Clarke in Hook. f. Fl. Brit. Ind. vi. 589, in Durand & Schinz, 

 Conspect. Fl. Afr. v. 537, and in Dyer, Fl. Cap. vii. 156 ; Durand 

 & Schinz, Etudes'Fl. Congo,i. 281 ; Urban, Symb. Antill. ii. 16. Cyperus 

 flavescens, Linn. Sp. PI. ed. 2, 68, not Linn. Herb. ; Kunth, Enum. ii. 

 5 ; A. Rich. Tent. Fl. Abyss, ii. 474 ; Boeck. in Linnsea, xxxv. 438 ; 

 C. B. Clarke in Journ. Linn. Soc. xx. 279 ; Kidley in Trans. Linn. Soc. 

 ser. 2, Bot. ii. 125 ; Zarb in Cat. Spec. Bot. Pfund, 39 ; K. Schum. in 

 Engl. Pfl. Ost-Afr. C. 117. P. flavescens, var. ahyssinica, C. B. Clarke 

 in Journ. Linn. Soc. xx. 279 ; Rendle in Cat. Afr. PI. Welw. ii. 106. 

 C. abyssinicus, Hochst. ex A. Rich. Tent. Fl. Abyss, ii. 474 ; Steud. 

 Syn. PI. Glum. ii. 4 ; Boeck. in I/inn?ea, xxxv. 440, and in Flora, 1879, 

 545 iiicl. var. m.onocephala ; Schweinf. Beitr. Fl. Aethiop. 214 ; Engl. 

 Hochgebirgsfl. Trop. Afr. 137 ; not of Oliver. 



Upper Guinea. Senegal, Perrottet ! Sierra Leone; near Freetown, Wel- 

 witsck, 7055 ! Niger Territory : Nupe, in rice fields, Barter, 1567 ! 



Wile X<and. Kordofan : Er llahad, Pfund, 604. Galabat : region of 

 Matamma, Schweinfurth, 2011 ! Abyssinia : Tigre ; near Adowa, Schimper, 122 ! 

 Mai Kabi, Schimper, 297 ! Dehli-Dikeno, Schimper, 253 ! Shireh ; in inundated 

 places, Quartin-Dillon I British East Africa: by the River Tigirish, Gregory! 

 by the Bahr el Ghazal, near the 'Nuer Villages, Schweinfxirth, 1173 I 1251 ! Bongo ; 

 Addai, Schiveinfurth, 1433 ! 



ZiO\^er Guinea. Lower Congo : at the moutlr of the River Kwa, 1000 ft.. 

 Hens, C, 117 ! Angola : Pungo Andongo, 3500 ft., in and near the Prsesidium, 

 Welwitsch, 6907 ! 6911 ! banks of the River Cuanza, near Sansamanda, Welivitsch, 

 6922 ! marshes near Qnitage, Welivitsch, 6923 ! Ambaca ; marshes near Lake 

 Canguele Canganga, Welivitsch 7087! 7096! Golungo Alto; boggy places near 

 Sange, WeUoitsch, 7072 ! 7101 ! near Ponte de Luiz Somoes, Welivitsch, 7088 ! 



lHozamb. Dist. Zanzibar, Taylor 1 British Central Africa : Tanganyika 

 Plateau, at Fort Hill, 3500-4000 ft., Whyte ! margins of ponds by the Nsessi River, 

 Scott ! 



Also in Europe, West Asia, North Africa, and America from Canada to South 

 Brazil. 



2. P. intermedius, C. B. Clarke. Annual. Stems 4-8 in. long. 

 Leaves f as long as the stem, yV-xV ^^- broad. Spikes loosely umbellate 

 (or 1) ; bracts 2-3, suberect, lowest up to 4 in. long, similar to the leaves. 

 Spikes of 3-8 clustered spikelets, ebracteolate. Spikelets \-\ by -^^ 

 in., compressed, narrower at each end, reddi6h-bro\\Ti, each perfecting 



