Final Picture Superba
Clematis × jackmanii Ranunculaceae
Jackman Hybrid Clematis KLEM-a-tis
- Deciduous vine, 5-20 ft (1.5-6 m), twining, needs support. Leaves opposite, pinnately compound, upper leaves often simple, leaflets ovate, slightly hairy on the underside. Flowers rich violet-purple, 11-14 cm across, generally 4 (5) petal-like sepals; blooming summer to fall.
- 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 with protection, (Snyder, 2000)] 4 Thought to be from a cross in 1858 of C. lanuginosa × C. viticella by George Jackman and Son, Woring, Surry, England and made available about 1862. Many other selections have been developed since the original violet-purple form (C. × jackmanii), these are designated as the Jackman Group and include:
- Alba - (syn. Jackmanii Alba) white flowers with bluish tinge around the margins of the sepals, about 11 cm wide, double, single later in the season.
- Comtesse de Bouchard - flowers almost circular, satin pink flushed with lilac, cream stamens.
- Rubra - red to purple, double, single later in the season.
- Star of India - reddish plum with a red midstripe, stamens yellow.
- Superba - (syn. Purpurea Superba, Jackmanii Superba) deep violet, considered a improvement of C. × jackmanii.
- For descriptions of additional Clematis in the Jackman Group, see Dirr (1998), Sunset Western Garden Book, and/or the websites of the American Clematis Society.