Clematis
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- Drugs.com - Clematis
- Royal Horticultural Society - Clematis
- Michigan State University - College of Agriculture and Natural Resources - An Introduction to Clematis
- NC State Extension - North Carolina Extension Gardener Plant Toolbox - Clematis
- The Spruce - A Guide to Clematis Pruning
- University of Illinois Extension - College of Agricultural, Consumer and Environmental Sciences - Clematis
- Clemson Cooperative Extension - Home and Garden Information Center - Clematis
- University of Nebraska-Lincoln - Institute of Agriculture and Natural Resources - Neb Guide - Clematis
- K-State Research and Extension Johnson County - Clematis
Clematis, genus of perennial, chiefly climbing shrubs of the buttercup family (Ranunculaceae) with about 370 species distributed over most of the world, especially in Asia and North America. Many species are cultivated in North America for their attractive flowers. The flowers may be solitary or in large clusters. The many fruits are conspicuous because of their persistent styles; they occur in spherical groups. The leaves are opposite, individually stalked, and compound—i.e., have several parts.
Common species include woodbine (Clematis virginiana); traveler’s joy, or old-man’s-beard (C. vitalba); virgin’s bower (C. cirrhosa); and vine bower (C. viticella). The most popular horticultural hybrids are found primarily in three species: C. florida, flowering on old wood in summer; C. patens, flowering on old wood in spring; and C. jackmanii, flowering on new wood in summer and fall.