134 JOURNAL OF THE ARNOLD ARBORETUM [vol. iv 



Populus Przewalskii Maximowicz in M61. Biol. xi. 321 (1881); in Bull. Acad. 

 Sci. St. Petersb. xxvn. 540 (1882). — Kanitz in Szechenyi, Keletazs. 

 Utjdn. Tudom. Ered. n. 842 (PI. Enum. 57) (1891); in Szechenyi, Wissensch. 

 Ergebn. Reise Ostas. n. 732 (1898). — Burkill in Jour. Linn. Soc. xxvi. 

 537 (1899). 



Kansu: between the river Hoangho and the Great Wall, A r . Przewalski 

 (ex Maximowicz, 1. c., and Schneider, 1. a); L. Loczy (ex Kanitz, 1. c). 

 Distribution: also Mongolia, eastern Tibet. 



Populus Purdomii Rehder in Jour. Arnold Arb. in. 225 (1922). 



Populus suaveolens Przewalski Meyer in U. S. Dept. Agric. Bur. PI. Indust. 

 Invent. Seeds PL Import, xlii. 35, pi. 5 (1918); non Schneider. 



Shensi: Tai pei shan, W. Purdom, no. 1111 (type), 1910, no. 1110, 

 1910. — See also Rehder, 1. c. 



Kansu: near Kagoba, alt. 2300-2600 m., F. N. Meyer, nos. 1816, 1993, 

 October 30, 1914; Yin kwan dien, F. N. Meyer, no. 1945, September 23, 

 1914. — See also Meyer, 1. c. and Rehder, 1. c. 



Distribution: also Szechuan. 



Populus Simonii Carriere in Rev. Hort. 1867,360. — Kanitz in Szechenyi, 

 Keletazs. Utjan. Tudom. Ered. n. 841 (PL Enum. 58) (1891); in Szechenyi, 

 Wissensch. Ergeb. Reise Ostas. n. 732 (1898). — Schneider in Sargent, PI. 

 Wilson, in. 21 (1916).— Bailey, Gent. Herb. i. 16 (1920).— Cowdry in 

 Jour. N. China Branch R. As. Soc. liii. 174 (PI. Peitaho) (1922).— Hers 

 in Jour. N. China Branch R. As. Soc. liii. 113 (1922); Liste Ess. Lign. 



Honan, 22 (1922). 



Populus balsamifera var. Simonii Wesmael in Bull. Soc. Bot. Bel«z;. xxvi. 



378 (1887).— Burkill in Jour. Linn. Soc. xxvi. 536 (1899). 

 Populus balsamifera var. laurifolia Burkill, 1. c. 535 (1899), ? in part; non 



Wesmael. 



Chili: near San tun ying on sandy places along mountain streams, 



F. N. Meyer, nos. 974, 975, May 31, 1913; Kalgan, Methodist compound, 

 N. H. Cowdry, no. 1441, June 6, 1921; Nankow, J. G. Jack, October 6, 

 1905; Si wan tze, G. E. Simon (ex Burkill, I. c); Ta han ling, J. Hers, no. 

 1642, September 7, 1921; Po hua shan, ,/. Hers, no. 1561, September 9, 

 1921; Huai lai hsien, Liu shu chwang, alt. 800 m., J. Hers, no. 2073, 

 Oct. 3, 1922; Huai lai hsien, Yang kia ping, alt. 900 m., J. Hers, no. 2090, 



October 4, 1922; Peking, western hills, alt. 600 700 m., J. Hers, nos. 



2219, 2227, October 11, 1922; Peking, J. Hers, nos. 2255, 2256, 2257, 



2259, October 18, 1922. — See also Burkill, 1. c, Schneider, 1. c. and Cowdry, 

 1. .. 



Honan: Nei hwang, alt. 100 m., J. Hers, no. 2557, October 31, 1922. — 

 See also Bailey, 1. c. and Hers, 1. c. 



Shensi: Lung chow, Kuan shan, alt. 2000 in., J. Hers, no. 2333, July 3, 

 1922. 



Kansu: L. Loczy, no. 184 (ex Kanitz, 1. c). 



Distribution: also Hupeh, Szechuan; Manchuria, Korea. 



