Also known as Sweet Autumn Clematis, Japanese Clematis, Sweet Autumn Virgin's Bower
Autumn clematis is a vigorous woody vine that smothers surrounding foliage under a cascade of sweet-scented white blooms in late summer and early autumn. Each flower features four star-like sepals surrounding a prominent spray of stamens, attracting dozens of honeybees and native pollinators. Following pollination, the plant transforms into a striking cloud of silvery, feathery seed heads that persist well into winter.
Contains irritating toxins that cause mouth sores and skin rashes; handle with gloves and keep away from pets.
Why it is dangerous
Contains protoanemonin, an oily glycoside that causes severe oral burning, blistering, gastrointestinal pain, and contact dermatitis upon skin exposure.
How to recognize a risky encounter
Look for dense clusters of fragrant, star-shaped white flowers with four sepals in late summer to autumn, followed by fluffy seed heads.
What to do
Wear gloves when pruning or clearing vines to avoid skin contact with sap, and keep away from pets and children.
Responsible observation
Pruning: Cut back stems nearly to the ground in early spring to control aggressive growth.
Identification: Distinguish from native virgin's bower by its smooth, untoothed leaf margins.
Garden Placement: Provide a sturdy trellis or fence line away from delicate native shrubs.
