Pentacentron sternhartae is known from specimens which are recovered from outcrops of the early Eocene, Ypresian[1] Klondike Mountain Formation in Republic.

[1] The plant community preserved in the Klondike Mountain formation is a mixed conifer–broadleaf forest with large pollen elements of birch and golden larch, but also having notable traces of fir, spruce, cypress, and palm.

At the time of description, type series specimens were preserved in the Stonerose Interpretive Center paleobotanical collections in Republic, Washington.

Additionally the species Trochodendron drachukii is known from related Kamloops group shales at the McAbee Fossil Beds near Cache Creek, British Columbia.

Growing from the middle area of each chamber is an apically and inwardly curving persistent style, each with an elliptical nectary bulge at its base.