BETULACEAE. — BETTTLA 477 



Petrop, XXn. 43 {Fl Mansh. II.) (1903). — Nakai in Tokyo Bot. Mag. XXIX. 

 43 (1915). 



Betula Ermaniy var. costata Regel, in Noiw. Mem. Soc, Nat, Mosc. XIII. pt. 2, 



123, t. 13, fig. 1-6 {Monog. Betulac. 65) (1861). 

 Betula ulmifolia, var. costata Regel in Bull. Soc. Nat. Mosc. XXXVIII. pt. 2, 



414 (1865); in De Candolle, Prodr. XVI. pt. 2, 176 (ISGS). —Herder in 



Act. HorL Petrop, XII. 68 (1892). — Winkler in Engler, PJlanzenr. IV.-61. 



64 (1904). 

 Betula ulmifolia Dippel, Handh. Lauhholzk. 11. 188 (pro parte, non Siebold & 



Zuccarini) (1892). — Koehne, Deutsche Dendr. 108 (pro parte) (1893). — 



Schneider, III. Handh. Lauhholzk. I. 101, fig. 53 o-o*, 54 k-k^ (pro parte 



maxima) (1904). 



NORTHEASTERN ASIA. M andshuria : fluvium Sutar, circa Kanskii, June 

 13, 1895, V. Komarov (No. 485; sterile); 12 hours east of Harbin, mountains, 

 April 31, 1903, C S. Sargent (large tree, with pale yellow scaly bark on trunk 

 and large branches; sterile). Amur: without precise locality, 1859, C. Maxi" 

 mowicz (fruits). Korea : " in montibus Chirisan " (ex Nakai). 



As far as 1 can judge from the material before me the most distinct character of 

 this species seems to be the rather narrow ovate-oblong acuminate leaves with 

 numerous nerves and very fine and acuminate double serration. The shoots are 

 glabrous or show a fine villose pubescence hke those of forms of B. grossa Siebold & 

 Zuccarini, 



13, Betula grossa Siebold & Zuccarini in Ahh. AJcad. Munch. IV. pt. 2, 228 {FL 

 Jap. Fam, Nat. 1. 104) (1845). — Regel in Bull. Soc. Nat. Mosc. XXXVlll. pt. 

 2,417 (1865); in De Candolle, Prodr. XVI. pt. 2, 178 (1868). — Shirai in Tokyo 

 Bot. Mag. VIII. 320, t. 6, fig. 13-15 (1894). — Shirasawa, Icon. Ess. For. Jap. I. 

 t. 22, fig. 12-25 (1900), — Schneider, III. Handh. Lauhholzk. H. 884 (1912).— 

 Rehder in Bailey, Stand. Cycl. Hort. I. 499 (1914). 



f Betula alha Thunberg, Fl. Jap. 76 (non Linnaeus) (1784). 



Betula carpinifolia Siebold & Zuccarini in Ahh. Akad. Mxinch. IV. pt. 2, 228 



{Fl. Jap. Fam, Nat. I. 104) (1845). — Regel in Bull. Soc. Nat. Mosc, 



XXXVlll. pt. 2, 417 (1865); in De Candolle, Prodr. XVI. pt. 2, 178 



(1868). —Winkler in Engler, PJlanzenr. IV.-61, 62 (1904). 

 Betula ulmifolia Siebold & Zuccarini in Ahh. Akad. Miiruih. IV. pt. 2, 229 



{Ft. Jap. Fam. Nat. I. 105) (1845). — Regel in Nouv. Mem. Soc. Nat. 



Mosc. XIII. pt. 2, 124, t. 6, fig. 20-25 {Monog. Betulac. 66) (1861) ; in Bull. Soc. 



Nat. Mosc. XXXVlll, pt. 2, 412 (pro parte) (1865). — Shirai in Tokyo Bot. 



Mag. VIII. 320, t. 6, fig. 16-19 (1894).— Shirasawa, Icon. Ess. For. Jap. 1. 1. 



22, fig. 1-11 (1900). — Henry in Henry & Elwes, Trees Gr. BHt. & Irel. IV. 



979 (1909). — Bean, Trees & Shruhs BHt. Isl. 1. 263 (1914). 

 Betula lenta, var. grossa Regel, in Nouv. Mem. Soc. Nat. Mosc. XIII. pt. 2, 127, 



t. 6, fig. 27-28 (Monog. Betulac. 69) (1861). 

 Betula lentay var. carpinifolia Regel, 1. c. (1861). 

 Betula ulmifolia, var. sericea Winder in Engler, PJlanzenr. IV.-61, 64 (1904). 



JAPAN. Hondo: prov. Rikuchu, Hayachine-san, June 6, 1905, [/. Faurie 

 (No. 6638); prov. Shimotsuke: Nikko, alt. 1200 m., May 18, 1914, E. H. Wilson 

 (No. 6710; tree 13 m. tall, girth 1.2 m., bark smooth, dark gray; flowers); round 

 Lake Chuzenji, common, May 23, 1914, E. H. Wilson (No. 6735; tree 17-25 m. 

 tall and 1.2-3.6 m., bark dark gray; flowers); same locality, October 21, 1914, 

 •E. H. Wilson (No. 7680; tree 20-25 m. tall, girth 2.1-3 m., "Yoguro-minebari,'* 



