BETULACEAE. — BETXITLA 477 



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

 43 (1915). 



Betula Ermani, var. costata Kegel, in Nouv. Mem. Sac. Nat. Mosc. XIII. pt. 2, 



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

 Betula ubnifolia, var. costata Kegel in Bull. Soc. Nat. Mosc. XXXVIII. pt. 2, 



414 (1865); in De Candolle, Prodr. XVI. pt. 2, 176 (1868). — Herder in 



Act. Ilort. Petrop. XII. 68 (1892). — Winkler in Englcr, Pjlanzenr. IV.-61. 



64 (1904). 

 Betula ulmifolia Dippel, Handb. Laubholzk. II. 188 (pro parte, non Siebold & 



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



Schneider, III. Handb. Laubholzk. I. 101, fig. 53 o-oS 54 k-k^ (pro parte 



maxima) (1904). 



NOKTHEASTEKN ASIA. Mandshuria : fluvium Sutar, circa Kanskii, Jime 

 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 I 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 like those of forms of B. grossa Siebold & 

 Zuccarini. 



13. Betula grossa Siebold & Zuccarini in Abh. Akad. Munch. IV. pt. 2, 228 {Fl. 

 Jap. Fam. Nat. I. 104) (1845). — Kegel in Bull. Soc. Nat. Mosc. XXXVIII. pt. 

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

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

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

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



f Betula alba Thunberg, Fl. Jap. 76 (Hon Linnaeus) (1784). 



Betula carpinifolia Siebold & Zuccarini in Abh. Akad. Munch. IV. pt. 2, 228 



{Fl. Jap. Fain. Nat. I. 104) (1845). — Kegel in Bull. Soc. Nat. Mosc. 



XXXVIII. 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 Abh. Akad. Milnch. IV. pt. 2, 229 



{Fl. Jap. Fam. Nat. 1. 105) (1845). — Kegel in Nouv. M6m. Soc. Nat. 



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



Nat. Mosc. XXXVIII, 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. Brit. & Irel. IV. 



979 (1909). — Bean, Trees & Shrubs Brit. Isl. 1. 263 (1914). 

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



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

 Betula lenta, var. carpinifolia Kegel, 1. c. (1861). 

 Betula ulmifolia, var. sericea Winkler in Engler, Pjlanzenr. IV.-61, 64 (1904). 



JAPAN. Hondo: prov. Rikuchu, Hayachine-san, June 6, 1905, U. 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. II. 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," 



