111. PonyaoNACEX. 333 
Polygonum polymorphum, Ledeb. Fl. Ross. iii. p. 524; Meisn. in DC. 
Prodr. xiv. p. 139; Franch. et Savat. Enum. Pl. Jap. ii. p. 477 ; Fran- 
chet, Pl. David. p. 257 (B. salignum); Maxim. in Mél. Biol. ix. p. 618; 
Debeaux, Fl. Tchef. p. 122 (var. arenarium). 
Polygonum sibiricum, Linn. f. Suppl. p. 228, non Laxm. 
Curumi: Peking (Bretschneider! Bullock!) ; SmiwakiwNa: 
Kaichow to Kinchow (Ross!); SmawruNG: Chefoo (Faber! 
Maingay!); Corea: Chemulpo (Carles !), East side (Perry!). 
Mus. Brit.; Herb. Kew. 
Western Europe to North-western India, and through Siberia 
to Japan; also in eastern North America. 
3. Polygonum amphibium, Zinn. Sp. Pl. ed. 1, p.361; Meisn. 
in DC. Prodr. xiv. p. 115; Hook. f. Fl. Brit. Ind. v. p. 34; 
Maxim. Ind. Fl. Pek. in Prim. Fl. Amur. p. 476; Franchet in 
Mém. Soc. Sc. Nat. Cherbourg, xxiv. p. 249. 
Cuina: without locality (Staunton !); Cmumr: Peking (ex 
Maximowicz); Suantuna (Maingay!). Mus. Brit.; Herb. 
Kew. 
All round the north temperate zone. 
/ Var. vestitum, Hemsl.; terrestre, rigidum, caule densissime 
longeque strigoso-hirsuto, foliis dense strigillosis, spica breviter 
pedunculata. 
SuawTUNG: Chefoo (Forbes!). Herb. Kew. 
At first sight this would not be recognized as a variety of 
P. amphibium, Linn., but there are specimens in the Kew Her- 
barium from Central Asia, intermediate in character between it 
and the almost glabrous European terrestrial state of the 
species. 
4. Polygonum amplexicaule, D. Don, Prodr. Fl. Nep. p. 70; 
Meisn. in DC. Prodr. xiv. p. 126; Hook. f. Fl. Brit. Ind. v. 
p. 32; Bot. Reg. 1839, t. 46; Bot. Mag. t. 6500; Hook. Ic. Pl. 
xviii. t. 1743 (var. sinense). l 
Polygonum ambiguum, Meisn. in DC. Prodr. xiv. p. 126; Wight, Ic. 
Pl. Ind. Or. t. 1797. 
Polygonum speciosum, Meisn. loc. cit. l 
Huren: Patung district (A. Henry). Mus. Brit.; Herb. 
Kew. 
North India from Murree to Sikkim. 
LINN. JOURN.—BOTANY, VOL. XXVI. - 
