18 WILSON EXPEDITION TO CHINA 



timber tree); without locality, A. Hennj (No. 5423; male catkins, 

 No. 4013, fruits). 



Possibly P. Fargesii may prove to be the preceding species, but according to 

 Burkill, 1. c, Franchet himself pointed out that his P. Fargesii should be united 

 with P. lasiocarpa. Unfortunately 1 have not seen Franchet's type specimen 

 which came from Tchen-keou-tin, Szech'uan, and his description is too insuffi- 

 cient. The pubescence of the leaves and branchlets of P. lasiocarpa is variable, 

 and cultivated plants usually are much more glabrous than the wild trees. 



In moist woods this is a very common tree in western Hupeh and eastern Sze- 

 ch'uan, but I do not remember meeting with it in western Szech'uan. It is a tree 

 of medium size with a straight and relatively thin trunk clothed with dark gray 

 fissured bark. The crown is pyramidal or rounded at the top and rather sparingly 

 branched and the branchlets are thick. Colloquially it is known as the Tai-erh-po. 

 Pictures of this Poplar will be found under Nos. 561, 563, 572, 0127 and 0130 of the 

 collection of my photographs and also in my Vegetation of Western China, Nos. 401, 

 402. 



The specimen figured in the Botanical Magazine (1. c.) has polygamous flowers, 

 but this is not normal in this or any other species of Poplar, though it has been 

 detected occasionally in many species and probably occurs from time to time in 

 them all. In the Botanical Magazine (1. c.) it is stated that the introduction of 

 this Poplar was effected by means of "a living plant." This should read "plants," 

 since the original consignment which I sent to Messrs. Veitch comprised about a 

 dozen small specimens of this tree, and probably normal flowers of the two sexes 

 will appear when these trees flower. E. H. W. 



Populus suaveolens Fischer in Allg. Gartenzeit. IX. 404 (1841); in 

 Bull. Acad. Sci. St. Petersbourg, IX. 348 (1842).— Ledebour, Fl 

 Ross. III. 2, 629 (1850). — Maximowicz in Bull. Soc. Nat. Mosc. 

 LIV. 51 (1879), tantum forma a pro parte. — Koehne, Deutsche Dendr. 

 84 (pro parte) (1893). — Schneider, III Handb. Laubholzk. I. 14 (pro 

 parte) (1904).— Dode in Mem. Soc. Nat. Hist. Autun, XVIII. (Extr. 

 Monog. Ined. Populus, 61) vix v. tantum pro parte (1905). — Asch- 

 erson & Graebner, Syn. Mitteleur. Fl. I. 48 (pro parte) (1908). — 

 Gombocz in Math. Termesz. Kozl. XXX. 110 (1908), exclud. var. P. — 

 Henry in Gard. Chron. ser. 3, LIII. 198, fig. 88 (1913) ; in Elwes & 

 Henry, Trees Gr. Brit. & Irel. VII. 1841, t. 410, fig. 25 (1913). 



Populus balsamifera Pallas, Fl. Ross. I. 1, 67, t. 41 (excl. fig. B) (non Lin- 

 naeus) (1784). 



Populus balsamifera, var. y intermedia Loudon, Arh. Brit. III. 1674 (1838). 



Populus balsamifera, var. t suaveolens Loudon, Arb. Brit. III. 1674 (1838). — 

 Wesmael in De Candolle, Prodr. XVI. 2, 330 (1868); in Mem. Soc. Sci. 

 Hainaut, III. 246 {Monog. Populus, 66) (pro parte) (1869). — Burkill in 

 Jour. Linn. Soc. XXVI. 535 (1899), pro parte, includ. var. laurifolia. — 

 Matsumura, Ind. PI. Jap. II. pt. 2, 7 (1912). 



Populus pseudobalsamifera Turczaninow in Bull. Soc. Nat. Mosc. I. 101 (no- 

 men nudum, non Fischer) (1838) secundum specim. originale, fide Henry. 



