자작나무科의 導管形態에 依한 分類 = Xylotomy of Korean Betulaceae

다국어 초록 (Multilingual Abstract)

To determine the degrees of specialization and intergeneric relationship within the Korean Betulaceae a comparative anatomy was performed with 3-4 year-old parts of growth rings of the stem wood from a total of 18 species and 7 varieties of the family. Some specialized anatomical characters suggests the family to be more or less advanced.
Tribe Betuleae possessing scalariform perforation plates exclusively, steeper angle of end wall and alternate pittings, was thought to be more primitive than tribe Coryleae. Among the Betuleae, Alnus exhibited to be more primitive than Betula on the bases of the number of bars on the perforation plate, the angle of end wall and the pitting pattern. Among the coryleae, it was thought that Corylus having a scalariform perforation plate exclusively, and a intermediate number of bars was the most primitive, whereas both Carpinus and Ostrya having simple perforation plates and homogeneous I ray were the most advanced.