SALICACEAE. — POPULUS 37 
According to Hooker f., Stewart and others the Lombardy Poplar is cultivated 
here and there in the northwestern Himalaya and western Tibet. To this form be- 
longs a specimen in the Gray Herbarium with the label: Populus balsamifera, Herb. 
Falconer No. 957. 
The typical P. nigra Linnaeus Spec. 1034 (1753) (P. nigra, var. typica Beck, 
Fl. Nied.-Oestr. 303 [1890]). — P. europaea Dode in Mém. Soc. Nat. Hist. Autun, 
XVIII [Eztr. Monog. Inéd. Populus, 51, t. 12, fig. 78] [1905] [non P. nigra Dode]) 
appears to find the eastern limits of its range in the Altai region. 
Of the very doubtful P. nigra, var. sinensis Carriére, I have seen only a culti- 
vated plant distributed by Dode and supposed to have come from the type plant. 
I do not know how to distinguish this cultivated plant from the Lombardy Poplar. 
The Lombardy Poplar has been introduced into China by foreigners and is cul- 
tivated especially in many of the treaty ports, including that of Ichang. It has also 
been introduced and is now cultivated in Tokyo and other parts of Japan. 
If the obscure P. nigra, var. sinensis Carriére, really came from China, and is 
really referable to P. nigra Linnaeus, the specimen was probably taken from a cul- 
tivated plant of the Lombardy Poplar. I do not believe that P. nigra Linnaeus or 
&ny of its forms grows spontaneously in China. E. H. W. 
Sect. 5. LEUCE Duby in De Candolle, Bot. Gall. 1. 427 (1828). — Gombocz in 
Math. Termesz. Kózl. XXX. 137 (Monog. Gen. Populi) (1908). 2 
Populus, subgen. Leuce Dode, Mém. Soc. Hist. Nat. Autun, XVIII. (Extr. 
Monog. Inéd. Populus, 13) (1905). 
Folia ramulorum turionumque saepe satis diversa, subtus pleraque discoloria, 
superne haud stomatifera, basi saepe v. haud glaudulifera; petioli plus minusve 
compressi v. foliorum turionalium plus minusve cylindrici, semper satis longi. 
Gemmae haud v. vix viscosae. Disci florum persistentes, sinuati; stigmata pleraque 
2, sessilia; stamina 5-20, subglobosa v. elongata, non apiculata. Capsulae satis 
parvae, elongatae. 
16. Populus alba Linnaeus, Spec. 1034 (1753). — Ledebour, Fl. Alt. IV. 295 
(1833).— Stewart, Punjab Pl. 203 (1869). — Hooker f., Fl. Brit. Ind. V. 638 
(1888). — Brandis, Ind. Trees 640 (1906). — Gombocz in Math. Termesz. Közl. 
XXX. 141 (Monog. Gen. Populi) (1908). 
Populus triloba Dode in Mém. Soc. Hist. Nat. Autun, XVIII. (Extr. Monog. 
Inéd. Populus, 21, t. 11, fig. 5) (1905). 
Populus Morisetiana Dode, 1. c. 22, t. 11, fig. 11 (1905). 
The species seems to be wild (and often planted) in the northwestern Himalaya, 
Tibet and Altai. I have seen no specimens from those regions, and I do not know 
if Dode's species may really indicate any distinct form. 
17. Populus tomentosa Carriére, in Rev. Hort. X. 340 (1867). — Wesmael in 
De Candolle, Prodr. XVI. 2, 325 (1868); in Mém. Soc. Sci. Hainaut, III. 228 
(Monog. Populus, 48, t. 17) (1869). — Schneider, JU. Handb. Laubholzk. 1. 21, fig. 
5 f-g*, 7 t-u (1904). — Dode in Mém. Soc. Nat. Hist. Autun, XVIII. (Extr. Monog. 
Inéd. Populus, 25, t. 11, fig. 21) (1905). — Ascherson & Graebner, Syn. Mitteleur. 
Fl. IV. 24 (1908). — Gomboez in Math. Termesz. Kózl. XXX. 140 (Monog. Gen. 
Populi) (1908).— Henry in Elwes & Henry, Trees Gr. Brit. & Irel. VII. 1786, t. 
408, fig. 2 (1913). 
Populus alba, var. denudata Maximowiez in Bull. Soc. Nat. Mosc. LIV. 48 
(non Hartig) (1879). 
