472 WILSON EXPEDITION TO CHINA 



JAPAN. Hokkaido: "in alpibus To-ka-chi," July 1905, U. Faurie (No. 

 6636; flowers; No. 6637; fruits); " in sylvis Jirafu," June 26, 1905, U. Faurie (No. 

 6633; fruits). Hondo: prov. Mutsu, Mt. Hakkoda, common, middle and upper 

 slopes, July 5, 1914, E. H. Wilson (No. 7094; tree 8-17 m. tall, girth 0.3-3 ra., 

 often mop-headed, bark fine, pale gray; young fruits); same locaUty, August 1904, 

 U. Faurie (No. 5784; fruits) ; prov. Ugo, Chokai-san, common near tree limit, Octo- 

 ber 9, 1914, E. H. Wilson (No. 7172, bush 5 m. tall; fruits); prov. Rikuchu, 

 Hayachine-san, June 6, 1905, U. Faurie (No. 6639 ; flowers) ; prov. Iwashiro, Ose, 

 August 17, 1912 (ex Herb. Sakurai; young fruits); prov. Shimotsuke: round 

 Yumoto, Onsenga-dake, alt. 2200-2300 m., woods, common, June 23, 1914, E. H. 

 Wilson (Nos. 6860, 6854; tree 8-13 m. tall; flowers); same prov., Yumoto, Hem- 

 lock forest, common, September 6, 1892, C. S. Sargent (large tree, spreading orange- 

 colored branches, young trunks pale, old trunks dark -n-ith thick bark, bark exfoliat- 

 ing; sterile); same prov., round Chuzenji, alt. 1300-1800 m.. May 25, 1914, E. H. 

 Wilson (No. 6751; tree 20-27 m. tall, girth 0.6-3.6 m., bark grayish white, exfoliat- 

 ing in thin sheets, common Birch; flowers); same locality, August 12, 1905, J. G. 

 Jack (fraits); same prov., summit of Nantai-san, alt. 2600 m.. May 29, 1914, E. 

 H. Wilson (No. 6789; bush 1.2-3 m. tall); same locality, August 2, 1908 (Herb 

 Sakurai; leaves very cordate with elongated unequal teeth) ; Nikko, August 8, 1904, 

 and August 12, 1909 (Herb. Sakurai; co-types oiYnr.japonica Koidzumi [B. nikocn- 

 sis Koidzumi]) ; same locality, 1904, N. Mochizuki; same prov., Mt. Nasu, August 

 19, 1903, and July 7, 1911 (Herb. Sakurai); prov. Kozuke, Mt. Asama, 2600 m., 

 August 11, 1909 (Herb. Sakurai); same locality, July 14, 1904, U. Faurie (No. 

 5783); prov. Shinano, on Tsubakura-dake, alt. 2000-2600 m., abundant, Sep- 

 tember 13, 1914, E. H. Wilson (No. 7511; tree up to 20 m. tall, girth 2.4 m., much 

 branched); same prov., Komaga-take, July 1905, U. Faurie (Nos. 6628, 6629); 

 prov.?, Ubaya, July 4, 1904, U. Faurie (No. 5785); without locality, 1892, C.S. 

 Sargent (tree 26X0.9 m., pale bark, orange-colored branches, handsome). 



The specimens from Saghalien and Hokkaido referred to tliis variety differ partly 

 in having fewer veins as in var. genuina, but their serration is mostly like that of the 

 forms of var. suhcordata from Hondo. It is as difficult to separate the last variety 

 from var. genuina as it is to distinguish different forms of var. suhcordata. These 

 forms which Koidzumi has described as B. nikoensis have rather triangular leaves 

 with a truncate base and 11-14 lateral veins, while what we may call typical var. 

 nipponica has distinctly cordate leaves which are more round-ovate, with 9-12 

 veins. I have failed to detect any characters sufficient to distinguish these forms 

 in a satisfactory way. 



Betula Ermanii, var. lanata Regel, in Nouv. Mem. Soc. Nat. Mosc. XIII. pt. 



2, 122 (Monog. Betulac. 64), t. 6, fig. 37-38 (1861); in Bidl. Soc. Nat. Mosc. 



XXXVIII. pt. 2, 415 (1865); in De Candolle, Prodr. XVI. pt. 2, 177 (1868). 

 Betiila Ermani Trautvetter & Meyer in Middendorff, Reise Sibir. 1. pt. 2, 



Bot. abt. 2, 83 {Fl. Ochot.) (1856). 

 Betula Ermani, var. tomentosa Regel in Bull. Soc. Nat. Mosc. XXXVIII. 



pt. 2, 415 (1865); in De CandoUe, Prodr. XVI. pt. 2, 177 (1868). 



Gemmarum squamae basi strobilorum tota facie albo-lanatae. Bractearum 

 lobi valde cihati et etiam exteriore facie plus minusve puberuh, laterales dis- 

 tincti erecti. Ramuli initio puberuh v. tomcntelli. Foha plus minusve triangu- 

 laria v. triangulari-ovata, breviter acuta, satis grosse subaequaliter dentato- 

 serrata, nervis utrinque 7-9(-10); petioli pilosi. 



NORTHEASTERN ASIA. Maritime prov. : "ad fl. Dshukdschandran," 

 July 10-12, 1844, A. T. von Middendorf (type of var. tomentosa, ex Regel); prope 



