Swamp leather-flower (Clematis crispa) is a perennial vine with distinct nodding flowers that have no petals. Rather, each bloom has four large petal-like sepals that are fused at the base, giving it a bell- or urn-like shape. The sepals separate and curl back as the flower opens. Swamp leather-flower occurs naturally in floodplain forests, wet hammocks and riverine swamps. It typically blooms in spring and summer, attracting a variety of pollinators. The seeds provide food for many birds and small wildlife.