Fruit Seeds are also showy and production is prolific. The flowers are white, borne in fall. Clematis terniflora is a climbing, semi-evergreen, ornamental vine. It commonly overgrows saplings and small trees, killing some. It blankets native vegetation and eliminates the basic source that plants need to make energy – sunlight, smothering vegetation beneath it. Foliage The leaves are opposite, compound (with 3-5 leaflets), and the margins are entire. Wonderful! X Close. Clematis terniflora, in addition to sweet autumn clematis, is also called Japanese clematis because it is native to Japan and China. Flowers White, fragrant, four-petaled flowers appear in the late summer through the fall. (5-7.6 cm) long. In late fall the fertilized flowers become fruit (seed) clusters of 5-6 fruits connected at the heads and each having a long white tail. Leaflets are each 2-3 in. The blooms are nicely fragrant and visited by bees. Clematis terniflora is a vine with opposite, pinnately compound leaves, on climbing stems. Prune to 1-2' tall in early spring as leaf buds begin to show, removing all dead stems above the buds. Clematis vitalba: sepals tomentose adaxially, leaf margins entire to crenate or dentate, and flowers with 20 or more carpels (vs. C. terniflora, with sepals glabrous adaxially, leaflet margins entire, and flowers with 10 or fewer carpels). Clematis virginiana: The genus name Clematis is from the Greek word "klematis", for climbing plants. The leaves are a leathery dark green.