Water Oak. (Quercus nigra) A middle-sized tree, rarely 80 feet high, found chiefly along streams and swamps. Leaves i§ to 3 inches long; i to 3 lobed at the end. Wood hard and strong, a cubic foot weighs 45 lbs. The acorns ripen in the second season so look out for its timber. This leaf has tufts of hair in the armpits of the veins beneath.