SALICACEAE. — POPULUS 21 
Western Szech’uan: west of Kuan Hsien, forests of Pan-lan- 
shan, alt. 2300-3700 m., July 6, 1908 (No. 2163, type; tree 32 m. tall, 
girth 4 m.); same locality, woodlands, alt. 2600-3300 m., October 1910 
(Nos. 4346, 4348; tree 24-32 m. tall, girth 4—4.5 m.); northeast of 
Tachien-lu, forest of Ta-p'ao-shan, alt. 2600-3700 m., July 3, 1908 (No. 
1413; tree 7.5—40 m. tall, girth 1-3 m.); same locality, alt. 2300-4600 
m., July 6, 1908 (No. 2165; tree 20-40 m. tall, girth 1.25—4 m.); south- 
east of Tachien-lu, woods, alt. 2300-2800 m., October 1908 (No. 1434; 
tree 20—24 m. tall, girth 1.5-2 m., bark gray); same locality, forests, 
alt. 2600-3300 m., October 1910 (No. 4355, tree 32-36 m. tall, girth 
4—4.5 m.); Lungan Fu, Tu-ti-liang-shan, alt. 2300-3000 m., August 
1910 (No. 4578; tree 20-32 m. tall, girth 1.25-2 m.); Mupin, alt. 
2400-2600 m., October 1910 (No. 4361; tree 17-20 m. tall, girth 
2.8-3.4 m.; sterile). 
Populus szechuanica is a very handsome species, judging by the young plants 
(from Nos. 4355 & 4361) in the Arnold Arboretum, which resemble in habit those 
of P. lasiocarpa Oliver. 
In the moist forests of western Szech'uan between 2200 and 3300 m. altitude this 
is a very common tree. It grows to a large size, and though usually associated with 
Firs, Spruces and Larches it often forms pure stands. In habit and general appear- 
ance it resembles P. suaveolens Fischer, but the branches are more massive and the 
branchlets are stouter. Even on old trees the leaves are large, approximating in size 
those of P. lasiocarpa Oliver. 
Pictures of this tree will be found under Nos. 123, 159, 183, 184 and 186 of 
the collection of my photographs, and also in my Vegetation of Western China, 
Nos. 392, 393, 394, 395. E. H. W. 
Populus Simonii Carriére in Rev. Hort. 1867, 360. — Wesmael in De 
Candolle, Prodr. XVI. 2, 330 (1868); in Mém. Soc. Sci. Hainaut, III. 
247 (Monog. Populus, 67) (1869). — Maximowiez in Bull. Soc. Nat. 
Mosc. LIV. 52 (1879). — Dippel, Handb. Laubholzk. II. 211, fig. 105 
(1892). — Koehne, Deutsche Dendr. 85 (1893). — Mouillefert, Traité 
Arb. & Arbriss. II. 1114 (1897). — Komarov in Act. Hort. Petrop. 
XXII. 746 (1904). — Schneider, Ill. Handb. Laubholzk. I. 16, fig. 6 
o-q (1904). — Dode in Mém. Soc. Hist. Nat. Autun, XVIII (Eatr. 
Monog. Inéd. Populus, 57) (1905). — Ascherson & Graebner, Syn. 
Mitteleur. Fl. IV. 47 (1908).— Gomboez in Math. Termesz. Közl. 
XXX. 105 (Monog. Gen. Populi) (1908). — Henry in Elwes & Henry, 
Trees Gr. Brit. & Irel. VII. 1839, t. 410, fig. 28 (1813). 
Populus laurifolia, var. Simonii Regel, Pycc. /[euóp. ed. 2, 152 (1883). 
Populus balsamifera, var. Simonii Wesmael in Bull. Soc. Bot. Belg. XXVI. 378 
(1887). — Burkill in Jour. Linn. Soc. XXVI. 536 (1899). 
Populus balsamifera, var. laurifolia Burkill, 1. c. 535 (non Wesmael) (1899), 
quoad specim. citata. 
