Carya cordiformis (Wangenh.) K.Koch
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Bark scaly; winter-buds bright orange- yellow; lfls mostly (5)7–9(11), the lateral lanceolate to lance-ovate or elliptic, the terminal commonly long-cuneate at base and sessile or nearly so; staminate catkins clustered just beneath the new growth on the wood of the previous year’s twigs; fr obovoid to subglobose, often somewhat flattened, 2.5–3.5 cm, winged chiefly above the middle, splitting to about the middle; nut subglobose to obovoid, 1.5–3 cm, at least two-thirds as thick; obscurely angled, otherwise smooth, tipped with a slender, persistent point; kernel bitter; cotyledons bifid; 2n=32. Woods; s. Me. and sw. Que. to Minn. and e. Neb., s. to Fla. and Tex. C. ×laneyi Sarg. is a hybrid with C. ovata.