1923] REHDER, THE LIGNEOUS PLANTS OF NORTHERN CHINA 155 



Betula fruticosa Pallas, Reise, in. App. 758, t. Kk, fig. 1-3 (1776). 

 Schneider in Sargent, PI. Wilson, n. 482 (1916). 



Chili: central and west Wei chang, W. Purdom, nos. 104, 8a (staminate 

 flowers), 1910. — See also Schneider, 1. c. 



Distribution: also Korea, Manchuria, Transbaikalia, Altai Mts. 



Betula davurica Pallas, Reise, m. 422, note, 321, 421, Kk, fig. 4a-b 



(1776). — Maximowicz in Mem. Div. Sav. Acad. Sci. St. Petersb. ix. 477 



(Ind. Fl. Pekin.) (1859); in Bull. Soc. Nat. Moscou, liv. pt. 1, 47 (1879). 



Franchet in Nouv. Arch. Mus. Paris, ser. 2, vn. 92 (PI. David, i. 282) 



(1884). — Burkill in Jour. Linn. Soc. xxvi. 498 (1899). — Schneider in 



Sargent, PI. Wilson. II. 483 (1916). 



Betula wutaica Mayr, Fremdl. Wald- u. Parkb. 450, fig. 169 (1906). 



Chili: west Weichang, W. Purdom, no. 109, 1910; Calceen wong, 

 W. Purdom, no. 63, 1910; Huai lai hsien, Yang kia ping, alt. 900 m., 

 J. Hers, nos. 2095, 2106, October 4, 1922; Po hua shan, J. Hers, no. 1430, 

 July 1, 1921 (sterile) ; Hsiao wu tai shan, alt. 2500-3100 m., F. N. Meyer, 

 no. 1207, 1910, August 12, 1913; J. Hers, no. 1472, July 14, 1921; Trappist 

 Monastery, western hills, near Peking, N. H. Cowdry, no. 1671, July 16, 

 1921. — See also Maximowicz, 1. c, Franchet, 1. c, Burkill, 1. c, Schneider, 

 1. c. 



Shansi: Wu tai shan, H. Mayr (ex Mayr, 1. c). 



Distribution: also Korea, Manchuria, Transbaikalia. 



Betula japonica Siebold apud Winkler in Engler, Pflanzenr. iv.-61, 

 78 (1904).— Schneider in Sargent, PL Wilson, n. 485 (1916).— Meyer in 

 U. S. Dept. Agric. Bur. PI. Indust. Invent. Seeds PI. Imp. xli, 34, no. 39489 

 (1917), excl. descript. 



Betula alba var. mandshurica Franchet in Nouv. Arch. Mus. Paris, s£r. 2, 



vn. 91 (PI. David. I. 281) (1884).— Burkill in Jour. Linn. Soc. xxvi. 496 



(1899).— Vix Regel. 

 Betula alba var. verrucosa Franchet, 1. c. (1884). — Burkill, 1. c. 497 (1899). — 



Non Regel. 

 Betula alba var. Tauschii Shirai in Tokyo Bot. Mag. vm. 319 (1894). — Burkill 



in Jour. Linn. Soc. xxvi. 497 (1899). 

 Betida japonica var. szechuanica Hers in Jour. N. China Branch R. As. Soc. 



liii. 107 (1922); Liste Ess. Lign. Honan, 5 (1922); non Schneider. 

 Betula verrucosa Limpricht, Bot. Reis. Hochgeb. Chin. Ost-Tib, 354 (1922); 



non Ehrhardt. 



Chili: Central and west Weichang, W. Purdom, no. 103, 1910; west 

 Weichang, W. Purdom, no. 124, 1910; Weichang, W. Purdom, nos. 8, 

 937, 997, 1910; Tsing shui tsien, J. Hers, no. 1626, September 6, 1921; 

 Po hua. shan, J. Hers, nos. 1428 and 1673, July 1 and September 9, 1921; 

 Hsiao wu tai shan, F. N. Meyer, no. 1163, Aug. 8, 1913; Hsiao wu tai 

 shan, Tieh ling alt. 1300 m., J. Hers, nos. 2136, 2142, October 7, 1922; 

 without locality, W. Purdom, no. 752, 1910. — See also Franchet, 1. c, Bur- 

 kill, 1. c. 496, 497, Schneider, 1. c, Meyer, 1. c, and Limpricht, 1. c. 



Honan: Tsi yuan hsien, Tien tan shan, J. Hers, nos. 1763 and 1791, 

 September 21, 1921. — See also Hers, 1. c. 



