Clematis Jackmanii Group

Origin: Cultivars are derived directly or indirectly from Viticella Group cultivars crossed with Patens Group cultivars.
Habit: Climbing, deciduous.
Leaf: Usually ternate or pinnate, herbaceous, petioled. Leaflets simple, margin entire or sometimes lobed to cleft.
Inflorescence: Usually an axillary solitary to few flowered dichasial cyme on young shoots in summer starting from the base upwards usually followed with a terminal flower. Some, if not all, cultivars will also flower on short shoots in spring when left unpruned starting with a terminal flower first.
Bracts: Present, leaflike and usually simple.
Flower: Bisexual, spreading to open-campanulate, usually nodding but somtimes horizontal or more or less upright, 4-15 cm across, bud nodding.
Tepals: 4-6, inside white, red-purple, violet or blue.
Stamens: In a few cultivars changed into tepal-like staminodes, filaments glabrous.
Flowering time: Late spring, summer and early autumn.
Seed tail: Either plumose or not, seedhead not persistant.
Zones: 4-11 (EU & USDA zones).
Hard pruning for summer flowers on growing shoots, but when left unpruned many cultivars will also flower on short shoots in spring.
Planting depth: About 5 cm deeper as in the pot, so slightly deeper.
Roots: Fleshy.
Leaves in seedlings: Opposite.



ref: Wim Snoeijer (2008) Clematis Cultivar Group Classification with Identifying Key and Diagrams.

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