Family, Birch. Many flowers in bracted catkins of 2 sorts, without corolla. Pistillate catkins peduncled, about 1 inch long, with 2 or 3 flowers in the axils of 3-lobed bractlets. Staminate flowers, 3 together, of 2 stamens, surrounded by a 4-toothed, membranous calyx, with 2 bractlets lying underneath. Fruit, a small winged nut. Leaves, rather thick, l>r<>a<l, oval or ovate, sometimes narrowed at base, coarsely toothed, with prominent veins reaching to the margin, short-]>etioled, pale green below, 1/2 to 1 1/2 inches long. May and June.