Clematis ligusticifolia
Photos are Clematis lasiantha, flower and seed are similar. This species likes moist conditions beside a stream.
Strong climber likes to have its roots in the shade and its growing tips in the sun. Lovely summer blossoms mature into eye-catching seed heads.

Pinnacles

Pinnacles

Edgewood County Park
Check availability of Clematis ligusticifolia at the nurseryCheck availability of Clematis at the nursery