657 



B. lenta, L. : Wats. Dendr. Brit. t. 144 ; Sargent Silva of 

 North America i. 44(S. North America. " Cherry 

 Birch." 



B. carpinifolia, Ehrli. 



V>. nigra, Du Roi (not L.). 



B. lutea, Michx. : Sargent Silva of North Anierica t. iVJ. 

 North America. " Yellow Birch." 



P.. excelsa, Pvrsli. (not Ait.). 



B. lenta var. lutea, Rfyel. 



\^. persicifoliu, Hort. 



B. Maximowiczii, Rexjel : Bot. Mag. Jap. viii. 1894, i. »>, 

 ff. 3G-8. Jajjan. 



B. Medwediewi, Hrgel Gartenflora 1887, iiSl, f. Caucasus. 



B. nana, L. ; Engl. Bot. ed. .3, t. 1297. Northern Hemis- 

 phere. 



B. nigra, L. ; Wats. Den<lr. Brit. t. 153 : Sargent Silva 

 of North America t. 45^. United States. '* J-ied 

 Birch." 



B. angulata, Lodd. 



B. canescens, Hort. 



B. flavescens, Hort. 



B. lanulosa, MicliJC. 



B. rubra, Mic/ix. 



B. occidentalis, Hipilc. ; Sargent Silva of North Ami-i-ica 

 t. 453. Western North America. " Black Birch." 



B. alba siihsp. occidentalis, Regel. 



B. papyrifera, M'irsh. ; Sargent Silva of North America 

 t. 451. Nortli America. *' Paper Birch ; Canoe 

 Birch." 



I 



B. alba var. papyrifera, Spach. 

 B. amygdalifolia, Hort. 

 B. cor<lifolia, RfgpJ. 



