158. CYPERACEF. 219 
31. Cyperus tuberosus, Rottb. Descr. et Ic. p. 28, t. 7. fig. 1; 
Kunth, Enum. Pl. ii. p. 50, pro parva parte; Boeck. in Linnea, 
xxxvi. (1869-70) p. 285 partim; C. B. Clarke, in Hook. f. Fl. 
Brit. Ind. vi. p. 616. 
Cyperus rotundus, Benth. FI. Austral. vii. p. 279, pro magna parte. 
Cyperus tenuiflorus, Roxb. Hort. Beng. p. 5, et Fl. Ind. i. p. 199, nec 
Rottb. 
Cyperus Retzii, Nees, in Wight, Contrib. p. 82; Kunth, Enum. PI. ii. 
p. 73. 
Formosa: Takow (A. Henry, 778! 1087!) Mus. Brit. ; 
Herb. Kew. 
Tropical Africa, India, and Australia. 
This species is so hardly separable from tall forms of C. ro- 
tundus that the very copious synonymy which has been accumu- 
lated is not here cited. The Formosa examples match very 
closely the Indian C. tenuiflorus, Roxb. 
32. Cyperus uncinatus, Poir. in Lam. Encye. vii. (1806) 
p. 247; Kunth, Enum. Pl. ii. p. 21; Boeck. in Linnea, xxxv. 
(1867-8) p. 502. 
Cyperus cuspidatus, H. B. K. Nov. Gen. et Sp. i. p. 204; Kunth, Enum. 
Pi. ii. p. 22; Boeck. in Linnea, xxxv. (1867-8) p. 496; C. B. Clarke, in 
Hook. f. Fl. Brit. Ind. vi. p. 598. 
Cyperus castaneus, Mig. FI. Ind. Bat. iii. p. 261; Hance, in Journ. 
Linn. Soc., Bot. xiii. (1873) p. 130, vix Willd. 
Cyperus solutus, Steud. Cyp. p. 14. 
Yunnan: Szemao, 5000 feet (A. Henry, 13390 !); Kwane- 
tuna: Macao (Lay!) Canton (Dods!), Whampoa (Hance, 
7461!). Mus. Brit.; Herb. Kew. 
In the tropics and warm temperate regions of Asia, Africa, 
and America. A common rice-field weed and on moist banks. 
To this is closely allied the true C. castaneus, Willd., a very 
much rarer species. 
33. Cyperus Zollingeri, Steud. in Zoll. Verz. Ind. Archip. i. 
(1854) p. 62; Boeck. in Linnea, xxxvi. (1869-70) p. 352; C. B. 
Clarke, in Hook. f. Fl. Brit. Ind. vi. p. 613. 
Cyperus bracteatus, Steud. Cyp. p. 19. 
Cyperus hexastachyus, Nees, in Nov. Act. Acad. Nat. Cur, xix. Suppl. 
i. (1843) p. 60. 
Cyperus tenuiculmis, Boeck. in Linnæa, xxxvi. (1869-70) p. 286, nec 
Boeck. in Flora, lxii. (1879) p. 554. 
Q2 
