Carya illinoinensis (pecan): 3.8 to 5 cm long, oblong, in clusters of 3 to 6; husk thin, narrowly four-winged, dark brown, hairy; nut elongate, rounded at the base and pointed at the tip, brown; shell thin; kernel oily and sweet.
Carya laciniosa (shellbark hickory or kingnut hickory): the largest of any hickory [in the area], 4.5 to 6.5 cm long and 3.8 cm broad, occurring singly or in pairs; thick husk splitting readily into segments when ripe; nut flattened, ridged; shell very thick and hard; kernel sweet.
Carya ovalis (red hickory): 2.5 to 3 cm long and about 2 cm wide; husk thin, about 2 to 2.5 mm thick, splitting freely to the base; nut with ridges extending from 1/3 to 1/2 its length; shell thin; kernel small and sweet.