Sixteen varieties of Birch are used medicinally: Betula alleghaniensis – Yellow Birch, Betula alnoides, Betula ermanii - Gold Birch, Betula glandulosa - Scrub Birch, Betula kenaica - Kenai Birch, Betula lenta - Cherry Birch, Betula nana - Dwarf Birch, Betula nigra - River Birch, Betula occidentalis - Water Birch, Betula papyrifera - Paper Birch, Betula pendula - Silver Birch, Betula platyphylla - White Birch, Betula populifolia - Grey Birch, Betula pubescens - White Birch, Betula schmidtii, Betula utilis - Indian Paper