Native to (or naturalized in) Oregon:
- Deciduous vine, 5-25 ft (1.5-7.5 m), vary by cultivar, twining, needs support. Leaves opposite, usually compound, but sometimes simple at stem tips; leaflets 2.5-10 cm long and 1-2 cm wide, ovate with entire margins. Flowers vary by cultivar, 5 to 20 cm wide, solitary or in clusters (cymes) of 2 -3, shades of white, pink, red, blue, lavender or violet. Bloom in spring. Fruit small and one-seeded.
- Part shade, most Clematis can handle sun if soil cool (not exposed), but semi-shade protects blossoms from fading. Prefers well-drained, organic, moist soil.
- Hardy to USDA Zone (3) 4 Many of the hybrids are the result of crosses between relatively few Clematis species. Over 200 hybrids are available, see Dirr (1998, p. 234) and the Sunset Western Garden Book for partial listings.