22 WILSON EXPEDITION TO CHINA 
Populus brevifolia Carriére ex Schneider, Ill. Handb. Laubholzk. Y. 16 (pro 
synon.) (1904). 
Western Hupeh: Hsing-shan Hsien, roadside, alt. 1300 m., very 
rare, May 8, 1909 (No. 1454; tree 12 m. tall, girth 1.50 m.). Western 
Szech'uan: Wén-chuan Hsien, Min River valley, alt. 1300-2300 m., 
abundant, October 1908 (No. 1420; tree 5-12 m.). Chili: near San- 
tun-ying, on sandy places along mountain streams, May 31, 1913, 
F. N. Meyer (Nos. 974, 975; attains often great size); Nankow, Octo- 
ber 6, 1905, J. G. Jack; Siwantze, G. E. Simon (Nc. 151, type, ex 
Burkill). 
NORTHEASTERN ASIA. Mandshuria: upper Amur, August 13, 1891, 
S. Korshinsky; common in country of Harbin, August 29, 1903, C. S. Sargent 
(branches slightly angular, leaves broadly obovate, a somewhat doubtful speci- 
men). 
This species, which has been so often confounded with P. suaveolens, appears 
sometimes to grow with that species. Its nearest relative may be P. laurifolia 
Ledebour. 
The shape of the leaves is variable, and in some forms the leaves are very small. 
On young vigorous shoots and also near the ends of the branches of older trees 
the leaves are round-obovate with a long acute base and are rounded and only shortly 
cuspidate at the apex, and the petioles are very short (2-20 mm.) and usually dark 
red. Such leaves measure from 3-13 cm. in length and from 2-10 cm. in width. 
The long-petiolate leaves of younger plants often greatly resemble those of P. 
suaveolens, but are nearly always obovate-lanceolate. Unfortunately I have not 
yet seen any female flowers or fruits. The whole plant seems to be glabrous. 
In Hupeh I met with only three trees of this Poplar, and these were growing by 8 
house half a day's march from the city of Hsing-shan Hsien. In the valley of the 
Min River in western Szech'uan it is common between 1300 and 2300 m. altitude | 
and is usually planted round houses and in villages. 1t is a more slender tree than 
P. suaveolens Fischer, with shorter and thinner branches, which form a rounded or 
oval erown. 'The Hupeh trees had ascending-spreading branches, but in Szech'uan 
the branches were spreading and the branchlets pendulous. Young trees raised from 
cuttings from both sources and growing in the Arnold Arboretum exhibit no appar- - 
ent difference in branching habit and resemble the Szech'uan type. A picture of 
this tree will be found under No. 0337 of the collection of my photographs. 
E. H. 
Here may be added two forms cultivated in the Arnold Arboretum. 
Populus Simonii, f. pendula Schneider, n. forma. 
A typo recedit ramis distincte pendulis, ramulis satis angulatis v. subalatis. 
To this form belongs a living specimen in the Arnold Arboretum. 
NM ere fastigiata Schneider, n. forma. i 
typo recedit habitu late pyramidali, ramis angulo acuto a trunco divergenti- 
bus, ramulis subangulatis v. subrotundis. 
This interesting form was discovered and introduced by F. N. Meyer through 
the Department of Agriculture of the United States. See his photographs in the 
collection of the Department of Agriculture Nos. 5288, 5335 and 5412. ; 
