The leaf is 1.9 cm wide, of incomplete length, with an asymmetrical base. Teeth are concave apical, straight basal, with simple apices. Bases are typically asymmetric and cordate to rounded. Leaf apices are not preserved.
Venation is craspedodromous with secondary veins produced alternately from the midvein.
Compound agrophic veins varying from 1 to 2 are produced by the secondaries. Tertiaries and quaternaries comprise usually 5-sided areoles containing 5th order veins. When visible, teeth are generally concave apical, straight basal, with a simple apex. The fossil record of Corylopsis is based primarily on seeds that occur from the Eocene throughout much of the Tertiary in Europe, the Eocene of eastern North America, and from one previous report of a leaf from the Eocene of Alaska. The presence at Republic of Corylopsis and other Hamamelidaceae-like leaves including the previously described Langeria magnifica demonstrates a high diversity in this group during the middle Eocene of western North America.