Corylopsis reedae

Corylopsis reedae is an extinct species of flowering plant in the family Hamamelidaceae known from fossil leaves found in the early Eocene Klondike Mountain Formation deposits of Northern Washington State.C. readae is one of the oldest occurrences of the winter-hazel genus Corylopsis, which includes between seven and thirty species, all found in Asia. Fossils from two other occurrences are of similar age to C. readae, with Paleocene specimens from Greenland being placed in the form taxon Corylopsiphyllum and an Eocene Alaskan fossil being included in Corylopsis without species placement.

Corylopsis reedae is represented by a single counterpart compression fossil specimen from the Ypresian-agedKlondike Mountain Formation that outcrops in Republic, Ferry County, Washington. The age of the formation is based on Argon–argon dating, which has returned a date of 49.4 ±0.5 million years old. The fossil was recovered from the "Corner lot", University of Washington site UWBM A0307, located within the city limits of Republic.

The holotype specimen for Corylopsis reedae is numbered UWBM 71085 and currently preserved in the paleobotanical collections of University of Washington in Seattle, Washington. The specimen was studied by paleobotanists Meghan G. Radtke and Kathleen B. Pigg of the School of Life Sciences, Arizona State University, and Wesley C. Wehr of the Burke Museum of Natural History and Culture in Seattle. Radtke, Pigg and Wehr published their 2005 type description for C. readae in the International Journal of Plant Sciences. The etymology of the specific name readae was derived from Katherine ("Kitty") M. Reed in honor of her contributions to the Tertiary stratigraphy and paleontology of the Pacific northwest.