Cyperus. | CLVI. CYPERACEA! (CLARKE). 317 
2. ©. Colymbetes, Kotschy et Peyr. Pl. Tinn. 49, t. 24. Gla- 
brous, floating. Stems tufted on an oblique rhizome, 1—2 ft. long, at the 
top ;4,-} in. in diam., triquetrous. Leaves 0. Head 1, of 6-30 sessile 
spikelets ; bracts 2, lowest shorter than the head. Spikelets J—? by 
4-4 in., much flattened, often 40-flowered, pallid or reddish, otherwise as 
C. nudicaulis.—C. B. Clarke in Durand & Schinz, Conspect. Fl. Afr. v. 
551; K. Schum. in Engl. Pfl. Ost-Afr.C.118, <Anosporum Colymbetes, 
Boeck. in Linnea, xxxvi. 412, and in Flora, 1879, 561; Schweinf. 
Beitr. Fl. Aethiop. 295. A. macrostachyum, Boeck. in Linnea, xxxvi. 
413. 
Nile Land. Floating on the White Nile near the mouth of the Bahr el 
Gebel, Schweinfurth, 1125! and near the Bahr el Ghazal, Brownell ! Werne ! 
Mozamb. Dist. German East Africa: without precise locality, Fischer, 637 ! 
Portuguese East Africa: Lower Zambesi ; Expedition Island, Kirk ! 
Also in Madagascar. 
This species is exceedingly close to C. nudicaulis, Poiret, and best recognised by 
the much thicker stem. The spikelets are usually broader and the glumes longer ; 
bnt in a Senegambian example (referred above to C. nudicaulis), the spikelets are 
us broad as in the average C. Colymbetes. 
3. CG. Teneriffe, Poir. in Lam. Encycl. vii. 245. _Glabrous. 
Stems 2-9 in. long, the broad reddish sheaths forming an oblong swell- 
ing at the base, tufted. Leaves 3 the length of the stem, ¢ in. broad. 
Head 1, of 3-20 sessile spikelets; bracts 2, the lower 1-2 in. long, 
similar to the leaves. Spikelets }-? by 1—} in., much compressed, red, 
10-36-flowered. Glumes closely imbricated, narrowly boat-shaped, 
strongly 4-ribbed on each side, conspicuously mucronate. Style about 
as long as the nut; branches 3, linear, rather shorter. Nut less than 
4 the length of the glume, ellipsoid or subovoid, with concave faces.— 
Nees in Linnea, x. 131; C. B. Clarke in Hook. f. Fi. Brit. Ind. vi. 
601, in Durand é& Schinz, Conspect. Fl. Afr. v. 579, and in Dyer, Fi. 
Cap. vii. 166; K. Schum. in Engl. Pfl. Ost-Afr. 0. 115. .6; rubi- 
cundus, Kunth, Enum. ii. 49 ; Boeck. in Linnea, xxxv. 507 ; Schweinf. 
Beitr. Fl. Aethiop. 216, and in Bull. Herb. Boiss. ii. Append. ii. 46, 
102; C. B. Clarke in Journ. Lion. Soc. xxi. 104; Engl. Hochgebirgsfl. 
Trop. Afr. 139; not of Vahl. C. Serra, A. Rich. Tent. Fl. Abyss. i. 
479. 
Nile Land. Eritrea: below Geleb, 5200 ft., Schweinfurth § Riva, 1256! 
Abyssinia: rocky places near Goelleb, 3500 {t., Schimper, 2340! and sharing Lapee 
locality, Schimper, 603! Somaliland : Mrs. Lort-Phillips. Keller, 90! 95 1 97! 
British East Africa : Uganda, Lugard! Lake Elmeteita, Gregory, 6574! — 
River, 6000-7000 ft., Scott-Elliot, 6574! Taita; Ndara Mountains, Gregory, 9! 
Ukamba, Hildebrandt, 2658! Tsimba (Shimba ) Mountains, Taylor ! 
Mozamb. Dist. Zanzibar, Taylor! German East Africa: Kilimanjaro ; 
Lake Chala, 2500 ft., Volkens, 322! Karagwe ; Bukoba, Stuhlmann, 1099! 
Also in Teneriffe, South Africa, Arabia, Madagascar and India. 
52. Glabrous. Stems 2-8 in. 
ato . ‘unth, Enum. ii. 
4. C. rupestris, Aunth, Lnun fibrillose leaf-sheaths, tufted. 
long, slender, thickened at the base by 
