Chaparral Clematis (Clelmatis lasiantha) is a creamy-white flowering vine, belonging to the Ranunculaceae family, of the large Clematis genus. It is found on the Pacific coast of North America, from the San Francisco Bay Area southwards into Baja California. It extends as far east as the western foothills of the Sierra Nevada, at elevations below 5900 feet. It grows on hillsides, in chaparral, and in open woodland.

Its leaves are three-lobed and generally grow in groups of three to five leaflets. It can be distinguished from the similar (but much more widely ranging) Virgin's Bower (Clematis ligusticifolia) by the fact that C. lasiantha normally only has one flower on each stalk, and at most three, whereas C. ligusticifolia has multiple flowers on each stem. Virgin's Bower is more likely to be found along streams or in other wet places, while the C. lasiantha tolerates more open, drier places.

Chaparral Clemitis is easy to grow, and grows fast if it finds trees or bushes through which it can wind. It prefers part shade but will tolerate full shade, though grow more slowly. Best to plant in shaded, rocky, well-draining slopes.

It tolerates summer water up to 1x per month but shouldn't need it if properly sited. In the drier parts of its range, it does best on north-facing slopes.

Gardeners value this plant for its long flowering season, nearly six months in spring and summer.