1923] REHDER, THE LIGNEOUS PLANTS OF NORTHERN CHINA 133 



SALICACEAE 



Populus euphratica Olivier, Voy. Empire Othoman. m. fig. 45-46 

 (1807).— Burkill in Jour. Linn. Soc. xxvi. 536 (1899).— Schneider in Sar- 

 gent, PL Wilson, m. 30 (1916). 



Chili: Peking, R. Alcock (ex Burkill, 1. c). 



Kansu: beyond the Great Wall, P. J. Piasezki ex Maximowicz (ex 

 Burkill, 1. c). 



Distribution: also Central and Western Asia, North Africa. 



It is extremely doubtful if the specimens recorded from Chili and from 

 Kansu belong to this species, and I suppose that specimens of P. tomentosa 

 Carr. with small deeply dentate and glabrous leaves have been taken for 

 P. euphratica. 



Populus suaveolens Fischer in Allgem. Garten-Zeit. ix. 404 (1841). 

 Maximowicz in Bull. Soc. Nat. Moscou, liv. 51 (1879). — Schneider in 

 Sargent, PI. Wilson, in. 18 (1916). — Hers in Jour. N. China Branch R. As. 

 Soc. liii. 113 (1922); Liste Ess. Lign. Honan, 22 (1922). 



Populus balsaminifera (sic) Kanitz in Szechenyi, Keletazs. Utjan. Tudom. 



Ered. II. 842 (PI. Enum. 57) (1891); in Szechenyi, Wissensch. Ergeb. 



Reise Ostas. n. 732 (1898); non P. balsamifera L. 

 Populus balsamifera var. suaveolens Loudon, Arb. Brit. ill. 1674 (1838). 



Burkill in Jour. Linn. Soc. xxvi. 535 (1899), pro parte. — Seemen in Bot. 



Jahrb. xxix. 275 (1900). 



Chili: Huai lai hsien, Liu shu chwang, alt. 800 m., J. Hers, nos. 2079, 

 2080, October 3, 1922; Huai lai hsien, Yang kia ping, alt. 900 m., J. Hers, 

 no. 2091, October 4, 1922; Ta hung men, J. Hers, no. 2217, October 10, 

 1922; Hsiao wu tai shan, alt. 1800 m., F. N. Meyer, no. 1311, August 23 

 and 28, 1913; same locality, J. Hers, no. 1488, July 14, 1921; Pohua shan, 

 J. Hers, no. 1654, September 9, 1921; Nankow, J. Hers, no. 1597, August 

 14, 1921; Peking plain, C. S. Sargent, September 17, 1903; Jehol, W. 

 Purdom, no. 2, 1909. — See also Maximowicz, 1. c, Burkil), 1. c. and Schnei- 

 der, 1. c. 



Shansi: Wu chai hsien, Ta nan kow, alt. 2000-3000 m., Tchuang Kieh, 



Hers nos. 2021, 2022, September 7, 1922; Lin hsien, Nan yan shan, alt. 

 2000-3000 m., Tchuang Kieh, Hers no. 2067, September 11, 1922. 



Shensi: Yenan fu district, W. Purdom, no. 351, 1910. — See also 

 Burkill, 1. c. and Seemen, 1. c. 



Kansu: between the river Hoangho and the Great Wall, P. J. Piasezki 

 (ex Maximowicz, 1. c, Burkill, 1. c. and Schneider, 1. c), L. Loczy (ex 

 Kanitz, 1. c). 



Distribution: also Szechuan; Manchuria, Sungaria to Turkestan. 



Plants raised from cuttings received from Purdom under nos. 283, 

 283a, 672, 672a are growing in this Arboretum. 



Populus suaveolens var. Przewalskii Schneider in Sargent, PL Wilson. 

 iii.32(1916). 



