156. NAIADACEJF. 193 
Potamogeton indicus, Roth, er Roem. e Schultes, Syst. Pl iii. p. 516. 
Saururus natans, Linn. Mant. alt. p. 227; (Rheede, Hort, Malab. xi. 
p. 31, t. 15). 
KwaweruxG: Pools near Canton (Sampson, 1268, 15588 !) 
Herb. Kew. 
Tropieal Asia and Australia. 
2. Aponogeton sp. 
Corea (Faurie !). 
POTAMOGETON. 
(By Arruur BexxErr, F.L.S.*) 
1. Potamogeton angustifolius, Bercht. et Presl, Rostlin, i. 
p. 19. 
Potamogeton Zizii, Roth, Enum. Pl. Germ, i. sect. i. p. 531. 
Potamogeton heterophyllus, var. latifolius, Mert. et Koch, Deutsch. FI 
i. p. 845. 
Yunnan: Plain of Tali (Delavay !). 
Europe, Asia, Africa, and America. 
2. Potamogeton crispus, Linn. Sp. Pl. ed. 1, p. 126; Kunth, 
Enum. Pl. ii. p. 133; Reich, Ic. Fl. Germ. vii. t. 29. fig. 50 ; 
Franch. et Savat. Enum. Pl. Jap. ii. p. 15; Hook. f. Fl. Brit. 
Ind. vi. p. 566. 
CHIHLI (Potanin!), near Peking (Bretschneider, 893); 
Kiawesu: Shanghai (Maingay, 422! Faber, 2!); YUNNAN 
(Delavay, 2500 !); Corea (Faurie!); Lucu ARCHIPELAGO 
(Wright, 323!). Mus. Brit.; Herb. Kew. 
Var. serratus, S. F. Gray, Nat. Arr. Brit. PL ii. p. 34. 
SHANGHAI (Lamprey !). 
North and south temperate and subtropical regions. 
The Corean plant is a narrow-leaved form. 
3. Potamogeton cristatus, Regel 4 Maack, Tent. Fl. Ussur. 
p. 153, t. 10. figs. 3-6. 
Potamogeton hybridus, Makino, Ill. Fl. Jap. i. no. 9, p. 2, t. 55, non 
Michaus Arth. Benn. in Journ, Bot. xxx. (1892 ) P 229. 
* Mr. Bennett had the Paris, St. Petersburg, and other collections of 
this genus on loan; hence this enumeration includes certain species and 
varieties not represented either at the British Museum or at Kew by Chinese 
specimens.— W. B. H, 
