194. 156. NATADACER. 
Krivkrawe (Maries!); Hrren: Ichang (4. Henry, 2377 !). 
Mus. Brit. ; Herb. Kew. 
Ussuri, Mandshuria, and Japan. 
4. Potamogeton Delavayi, Arth. Benn. in Journ. Bot. xxx. 
(1892) p. 228. 
YUNNAN ( Delavay, 4750 !). 
5. Potamogeton Gaudichaudii, Cham. et Schlecht. in Linnea, 
ii. (1827) pp. 177 et 199. 
Potamogeton mucronatus, Presl, Epim. Bot. p. 245; Hook. f. FL Brit. 
Ind, vi. p. 567. 
Potamogeton malaiana, Mig. Ill. Fl. Arch. Ind. p. 46. 
Potamogeton japonicus, Franch. § Savat. Enum. Pl. Jap. ii. p. 15. 
Potamogeton Wrightii, Morong, in Bull. Torrey Bot. Club, xiii. (1886) 
p. 158, 
Potamogeton lucens, Vidal, Phan. Cuming. Philipp. p. 155, non Linn. 
CumLr: Peking (Bretschneider, 9041); Formosa: Takow 
(A. Henry, 1208!), Bankingsing (A. Henry, 1203 A) ; Yun- 
NAN: Lac de Koumpo (Delavay, 2727 D: Kwayeruna: Canton 
(Graves in herb. Hance, 22226!); Corea (Faurie !)5 Lucu 
ARCHIPELAGO ( Wright, 320!). Mus. Brit.; Herb. Kew. 
India, Japan, Philippine Islands, Borneo, and Ladrone Islands. 
This species was distributed by Maximowicz under the name 
of Potamogeton tretocarpus. Oldham’s no. 635 from Formosa 
may be the young state of this species. 
6. Potamogeton Hillii, Morong, in Bot. Gaz. vi. (1881) p. 290, 
et in Mem. Torrey Bot. Club, iii. (1893) pt. ii. p. 88, t. 46? 
Hoven: Ichang (A4. Henry, 4375!). Herb. Kew. 
North-eastern United States. 
Dr. Henry’s specimen is destitute of fruit, hence it cannot be 
positively asserted to belong to this species, although in all 
other characters it agrees. 
7. Potamogeton javanicus, Hassk. in Verh. Natuurk. Ver. 
Nederl. Ind. i. (1856) p. 26; Hook. f. Fl. Brit. Ind. vi. p. 566. 
Potamogeton tenuicaulis, F. Muell. Fragm. i. pp. 90, 244. 
Potamogeton parvifolius, Buchenau, in Abhandl. Natur, Ver. Dremen, 
vii, (1880) p. 32. 
Potamogeton hy bridus, Hook. f. et Thoms. ex Hook. JF. Fl, Brit. Ind. vi. 
p. 566, non Michaux. 
Potamogeton heterophyllus, Buch.-Ham. in Wall. Cat. no. 5181. 
