Juglans cinerea L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Tree to 30 m; bark grayish-brown, with smooth ridges; pith dark brown; a dense pad of short hairs often present long the upper margin of old lf-scars; lfls 11–17, oblong-lanceolate, acuminate; pubescence, especially of the lower lf-surface, largely or wholly of stellate, few-rayed hairs; fr ovoid- oblong, 4–7 cm, somewhat pointed; nut ovoid to short-cylindric, longer than thick, very rough, marked with 2 or4 obscure longitudinal ridges. Rich, moist soil; N.B. to Minn., s. to S.C., Ga., and Ark. (Wallia c.)