On the history of the flora formation and evolution in the North-Eastern Asia during Paleogene

摘要

The northernmost Early Eocene flora in Asia (Kharaulakh flora) from the lower Lena River (71 deg NL) is discussed. More than 30 plant species, predominantly deciduous trees and shrubs, are found in its composition, including 2 new genera. The comparison of this flora with Paleocene -- Early Eocene floras of the Western Kamchatka showed a surprising similarity of their taxonomic composition -- more than 70 percent of the species are common. This phenomenon is probably related with a different speed of modernization of the paleoflora in the process of its formation and dissemination. The new genus Syringophyllum Budants. et Ozerov gen. nov. (Oleaceae?) is described.