128. SALICACER. 537 
NonrHERN CuUrNA (Simon ex Carriére); Saantune: Chefoo, 
perhaps cultivated (Fauvel!); SuENsr: Tsunghi mountains and 
elsewhere (Piasezki ex Maximowicz); KawNsum: Tsungli 
mountains (Prasezki ex Maximowicz). Mus. Paris. 
The type is widely spread in the temperate regions of the Old 
World; the variety is confined to Northern China. 
This variety, in its coriaceous leaves, approaches P. euphratica. 
6. Populus Przewalskii, Maxim. in Mél. Biol. xi. p. 321; 
Kanitz in Ber. math.-nat. Ungarn, (repr.) p. 11, et Pl. Exped. 
Szech. p. 57; Bretschn. Hist. Eur. Bot. Disc. p. 984. 
KawsuH: between the Hoangho and the Great Wall, Liang- 
tschou, Shandansiang, sands of Hautschou (Piasezki ex Maxi- 
mowicz), Hoangho (Szechenyi ex Kanitz, Przewalski ex Bret- 
schneider). 
Mongolia and Tibet. 
[Populus spinosa, F. P. Smith, Chinese Materia Med. p. 176, 
from Shensi, Shantung and Hupeh, is unknown to me. Its 
medicinal use may lead to an identification. ) 
7. Populus tremula, Linn. Sp. Pl. ed. 1, p. 1034; Wesmael in 
DC. Prodr. xvi. 2, p. 325; F. P. Smith, Chinese Materia Med. 
p. 176; Baker § S. Moore in Journ. Linn. Soc. xvii. (1879) p. 387 ; 
Franch. et Sav. Enum. Pl. Jap. i. p. 463; Franchet, Pl. David. 
i. p. 284; Fauvel in Mém. Soc. Sc. Nat. Cherbourg, xxiii. p. 200 ; 
Korshinsky in Act. Hort. Petrop. xii. p. 390. 
Cururr: Jehol (David, 1687, 1726 !), Peking (David, 2362!) ; 
SurwexrsG: Hingjing (Ross, 301!), Kwandien (Ross, 171!). 
between Tungcheshien and Maoershan, Yaloo River (James!) ; 
Kawsun: Tangut (Przewalski!); Cmxkrawe: Ningpo, culti- 
vated (Fauvel); Huren: Fang (A. Henry, 6736!); Yunnan: 
Maokoutakiang near Tali, 7200 ft. (Delavay, 896 !) ; SZECHUEN : 
Heoupin near Tchenkeoutin, 4600 ft. (Farges !) Mus. Brit.; 
Herb. Kew.; Mus. Paris. 
Europe, N. Africa, and Northern Asia to the Kurile Islands; 
in the more Eastern parts chiefly as var. villosa, Wesmael. 
/ Var. adenopoda, Burkill. - 
Populus adenopoda, Mazim. in Bull. Soc. Imp. Nat. Mosc. 1879, p. 50, 
Cuusan  AmocnrPELAGO: Siekintsien (Hugh!); Huren: 
Hankow, Yunyanfu (Piasezhi ex Maximowicz), Patung (A. Henry, 
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LINN. JOURN.—BOTANY, VOL. XXVI. 2P 
