36 WILSON EXPEDITION TO CHINA 
of the long-petioled leaves of the older plant is rather variable, being lanceolate- 
elliptic or elliptic-ovate with an acute base, or ovate, even round-ovate, with an - 
obtuse, round or slightly cordate base and an acute or shortly acuminate apex. — 
The largest measure over 13:8cm. The color is rather dull green above and whitish — 
beneath. The branchlets, petioles and the midribs of the leaves are commonly more ~ 
or less pubescent. According to Henry the fruits are slightly pubescent. Ihave 
not yet seen female flowers or fruits. Dode distinguishes the typical P. laurifolia 
by its glabrous fruits from P. Lindleyana with pubescent capsules. 
13. Populus Simonii Carriére. See p. 21. 
Populus Simonii, f. pendula Schneider. See p. 22. 
Populus Simonii, f. fastigiata Schneider. See p. 22. 
Sect. 4. AIGEIROS Duby in De Candolle Bot. Gall. ed. 2, 1. 427 (1828). — —— 
Gombocz in Math. Termesz. Közl. XXX. 75 (Monog. Gen. Populi) (1908). 4 
Populus, subgen. Eupopulus Dode, sect. Aegiri Dode in Mém. Soc. Hist. Nat. — 
Autun, XVIII. (Extr. Monog. Inéd. Populus, 14, 34) (1905). i 
Folia ramulorum turionumque satis similia, subtus vix v. paullo discoloria, viri — 
descentia, utraque pagina stomatifera, basi glandulifera; petioli plus minusve 
compressi, semper satis longi; gemmae plus minusve viscosae. Disci florum persis- 
tentes, sinuati; stigmata 2-4, plus minusve sessilia; stamina pleraque 15-30, - 
antheris subglobosis, non apiculatis. Capsulae variabiles. 
14. Populus afghanica Schneider, n. sp. 
Populus nigra, var. afghanica Aitchison & Hemsley in Jour. Linn. Soc. XVIII. 
96 (Fl. Kuram Vall.) (1880). — Gombocz in Math. Termesz. Közl. XXX. 91 
(Monog. Gen. Populi) (1908). 
AFGHANISTAN: Kuram valley, 1879, J. E. T. Aitchison (No. 161, sterile). 
The authors’ description is quite sufficient. They say: “ possibly it may prove 
a distinct species; but in the absence of very complete material we have not ven- 
tured to give it that rank. A large tree, fully 100 feet in height and 8 feet in girth; 
quite wild, also cultivated in the vicinity of Shálizán, but only at one shrine. In 
~ Hariáb district it is common, cultivated, and apparently wild also; in fruit 
ay. 
The extremely small leaves show on the upper side the same numerous stomata 
as the typical P. nigra Linnaeus. The branches are exceedingly slender. Dode | 
seems to have overlooked the description of this peculiar species. 
15. Populus nigra Linnaeus, var. italica Du Roi, Harbk. Baumz. II. 141 (1772). 
Populus nigra, var. pyramidalis Spach in Ann. Sci. Nat. sér. 2, XV.31 (1841).— 
Gombocz in Math. Termesz. Közl. XXX. 89 (Monog. Gen. Populi) (1908). 
? Populus nigra, var. sinensis Carriére in Rev. Hort. 1867, 340. — Wesmael in 
De Candolle Prodr. XVI. 2, 327 (1868); in Mém. Soc. Sci. Hainaut, II. 
258 (Monog. Populus, 59) (1869). — Maximowicz in Bull. Soc. Nat. Most. 
LIV. 50 (1879). — Burkill in Jour. Linn. Soc. XXVI. 536 (1899). — Gom- 
bocz in Math. Termesz. Közl. XXX. 91 (Mong. Gen. Populi) (1908). 
Populus sinensis Dode in Mém. Soc. Nat. Autun, XVIII. (Eztr. Monog. In&d. 
Populus, 50, t. 12, fig. 72) (1905). 
CHINA. Northern China: without locality, G. E. Simon (fide Carriére). 
Southern Kansu: P. J. Piasezki (fide Maximowiez). Shensi: 1875, P. J: 
Piasezki (fide Maximowicz). 
