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METHODICAL DISPOSITION 
OF THE 
MECHES. 
Betulaceæ. Richard. 
Monœcia Polyandria. Linn. Amentaceæ. Juss. 
FIRST SECTION. 
Fertile aments , pedunculated and pendulous. 
Canoe Birch, 
i Betula papyracea. 
Common European Birch, 
Betula alba. 
White Birch, 
Betula populifolia. 
SECOND SECTION. 
Fertile aments, sessile and erect. 
4. Red Birch, . . . Betula rubra. 
5. Yellow Birch, . . Betula lutea. 
6. Black Birch, . . . Betula lenta. 
