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Leaves are ovate to deltoid and doubly serrate. Buds are imbricate with no terminal bud. Fruit is a winged nut borne in an erect or pendant catkin (ament) with 3-lobed bracts. Scales are deciduous at maturity, gradually releasing nutlets from a persistent cone axis.
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Yellow Birch (B. alleghaniensis)
Sweet Birch (B. lenta)
Paper Birch (B. papyrifera)
Mountain Paper Birch (B. cordifolia)
Gray Birch (B. populifolia)
River Birch (B. nigra)
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