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Clematis is a genus of about 380 species [2] [3] within the buttercup family, Ranunculaceae. [4] Their garden hybrids and cultivars have been popular among gardeners, [5] beginning with Clematis 'Jackmanii', a garden staple since 1862; more cultivars are being produced constantly.
The following species in the flowering plant genus Clematis are accepted by Plants of the World Online. [1] Although the genus is currently most diverse in warm temperate regions and mountainous habitats, molecular evidence suggests that this is of recent origin, and earlier diversification occurred in more tropical climes.
Prior to the introduction of 'Jackmanii', the disease clematis wilt was little known and not widespread. [6] However, because 'Jackmanii' was bred from C. lanuginosa (a species which is susceptible to the pathogen which causes the disease), and because 'Jackmanii' led to a series of similar hybrids and the popularisation of the genus, clematis wilt soon became a serious problem for the new ...
Rogerson introduced numerous clematis species and varieties to North American gardeners through his extensive contacts with growers, breeders, and plant explorers throughout the world. By the time of his death in May 2015 at age 94, he had been collecting clematis for 44 years and was a respected author and lecturer on the genus. [4]
Clematis terniflora is not a native to the United States, but it can be found throughout. Brought over as an ornamental cultivar the plants were originally not considered invasive. It is now considered a Category II invasive plant, meaning it is invading native plant communities but has not yet seen as displacing native species.
The male plants are a little showier in flower and don't bear seed. The dry fruit is an achene with long hair as silvery gray feathery plumes attached in late August into November. It grows on the edges of the woods, moist slopes, fence rows, in thickets and on streambanks.
Clematis montana is a popular garden plant in temperate regions, with the ability to scramble up and over unsightly features such as sheds and fences. Left unchecked it can grow to 12 m (39 ft). The plant attracts bees, butterflies, and hummingbirds. [5] Numerous varieties and cultivars have been bred for horticultural use, including:
Clematis lanuginosa is a twice-bearing clematis that blooms once in spring and again in summer. In the US it grows best in American Horticultural Society zones 9 to 1, [3] which covers much of the US. [4] It is best known as a parent species for many of the large-flowered varieties of Clematis. [3]