SALICACEAE. — POPULUS 7 
northeast of Sungpan Ting, upland thickets, alt. 3000-3300 m., 
August 1910 (No. 4450; bushy tree, 6-7.5 m. tall; sterile). 
In the herbarium it is not easy to distinguish this species from the nearly related 
P. lasiocarpa Oliver, but according to Mr.Wilson's description, and judging by the 
young living plants in the Arnold Arboretum P. Wilsonii seems to be a very distinct 
species. It is readily distinguished from P. lasiocarpa by its habit, by the gla- 
brous and purple, not tomentose and yellowish branchlets and by the color of 
the leaves. These are bluish green above and rather whitish gray beneath, while 
the leaves of P. lasiocarpa are clear-green above and greenish and a little shining 
beneath. The shape of the leaves of P. Wilsonii is round-ovate, and not so deeply 
cordate at the base as the more broadly oblong leaves of P. lasiocarpa. The 
nearest relative to P. Wilsonii seems to be P. glauca Haines (see p. 30). 
This is a rare tree in western Hupeh and in Szech'uan, where it grows in forested 
country between 1300 and 3300 m., especially near watercourses. In the forests 
it is pyramidal in outline with rather thin ascending-spreading branches and dense 
foliage; in the open the outline is more or less columnar and the branches are short 
and spreading. The dark bluish-green leaves are strikingly handsome, and in habit 
and general appearance it reminds one of Idesia polycarpa Maximowicz. Pictures 
of this Poplar will be found under Nos. 090 and 099 of the collection of my photo- 
graphs. E. H. W. 
Populus lasiocarpa Oliver in Hooker’s Icon. XX. t. 1943 (1890). — 
Burkill in Jour. Linn. Soc. XXVI. 536 (1899). — J. H. Veitch in 
Jour. Hort. Soc. Lond. XXVII. 65, fig. 27 (1903). — Schneider, IU. 
Handb. Laubholzk. Y. 17 (1904). — Dode in Mém. Soc. Hist. Nat. 
Autun, XVIII. (Extr. Monog. Inéd. Populus, 66) (1905). — Ascherson 
& Graebner, Syn. Mitteleur. Fl. IV. 51 (1908). — Gomboez in Math. 
Termesz. Kózl. XXX. 120 (Monog. Gen. Populi) (1908).— Henry in 
Elwes & Henry, Trees Gr. Brit. & Irel. VII. 1846, t. 408, fig. 9 
(1913). — Bean, Trees & Shrubs Brit. Isl. II. 215 (1914). — Skan in 
Bot. Mag. CXLI. t. 8625 (1915). 
Populus Fargesii Franchet in Bull. Mus. Hist. Nat. Paris, 11. 280 (1896). 
Western Hupeh: North and south of Ichang, woods, alt. 1300- 
2300 m., May 1907 (No. 706, in part; tree 16-24 m. tall, girth 1.25- 
1.65 m.); same locality, June 1900 and 1901 (Veitch Exped. No. 384, 
in part; tree 7-13 m. tall; ripe fruits); Hsing-shan Hsien, woodlands, 
alt. 2000 m., July 1907 (No. 706, in part; tree 20 m. tall, girth 1.25 
m.); Fang Hsien, woodlands, common, 1800-2300 m., June 1910 (No. 
706, in part); without locality, May 1904, mountains, 2500 m. (Veitch 
Exped. No. 4538; tree, 20 m. tall); district of Chienshih, alt. 1300- 
2000 m., common in mountains, A. Henry (No. 5423*, type; good 
