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BETULA, 
The BIRCH-TREE. 
Clafs 2r. Order 4. Monoecia Tetrandria. 
*nTHE Male flowers are difpofed in a cylindrical Katkin. 
The Calyx , is a common Katkin, imbricated on all fldes, 
loofe and cylindrical,* compofed of triflorous Scales, to 
each of which, two very minute fcales are placed at the 
fldes. 
The Compound Corolla confifls of three florets, equal, and affix- 
ed to the difk of each fcale of the Katkin. 
The Proper is monopetalous, four-parted, fpreading, and 
fmall: the divifions obtufe and egg-fhaped. 
The Filaments are four, very fmall. The Antherce are twin. 
* The Female flowers are difpofed inKatkins on the fame plant. 
The Calyx is a common Katkin, imbricated : with three fcales 
everywhere oppofed, affixed to the rachis, heart ihaped with 
a point, biflorous, a little divided by a pointed body in the 
bofom towards the top, concave, and fhort. 
The Corolla none manifeft. 
The Gemen proper, is ovate, very imalL The Styles are two, 
briftly, and the length of the fcales. The Stigmas Ample. 
The Seed-veJJel none. The Katkin embracing the feeds of two 
florets under each fcale. 
The Seeds are folitary and ovate. 
The Species with us are , 
1. Betula nigra. Black , or Sweet-Birch. 
This becomes a large tree, often rifing to the height 
of fifty or fixty feet, and fending off many branches. 
The leaves are egg-fhaped and doubly or irregularly 
ferrated, the fmall ferratures are clofe, the larger 
more remote ; their footftalks are villofe. The fmall 
branches are aifo covered with down. The natives 
often make their canoes of the bark of this tree. 
i'. if: V , . ’ v . i'S . 
2. Betula 
