Middle Eocene
Kamloops Group, Tranquille Shale Member
Kamloops, British Columbia, Canada
25mm seed from a Golden Raintree on 60mm slab.

Seed.

Koelreuteria is a plant genus of the Family Sapindaceae, the soapberry family, which includes various tropical fruits like lychee, longan, and soapberries.  It known today from eastern and southern Asia but had a much wider range during the Eocene-Miocene as this specimen indicates.