Clematis occidentalis
Credits
New article for Trees and Shrubs Online.
Recommended citation
'Clematis occidentalis' from the website Trees and Shrubs Online (treesandshrubsonline.
Infraspecifics
Other taxa in genus
- Clematis acutangula
- Clematis aethusifolia
- Clematis afoliata
- Clematis akebioides
- Clematis akebioides
- Clematis alpina
- Clematis apiifolia
- Clematis armandii
- Clematis campaniflora
- Clematis chinensis
- Clematis chrysocoma
- Clematis cirrhosa
- Clematis connata
- Clematis crispa
- Clematis delavayi
- Clematis × diversifolia
- Clematis × durandii
- Clematis finetiana
- Clematis flammula
- Clematis florida
- Clematis fusca
- Clematis gracilifolia
- Clematis grata
- Clematis heracleifolia
- Clematis integrifolia
- Clematis × jackmanii
- Clematis × jouiniana
- Clematis lanuginosa
- Clematis lasiandra
- Clematis ligusticifolia
- Clematis macropetala
- Clematis meyeniana
- Clematis montana
- Clematis nannophylla
- Clematis napaulensis
- Clematis orientalis
- Clematis paniculata
- Clematis patens
- Clematis phlebantha
- Clematis pitcheri
- Clematis × poizatii
- Clematis potaninii
- Clematis quinquefoliata
- Clematis ranunculoides
- Clematis rehderiana
- Clematis serratifolia
- Clematis songorica
- Clematis stans
- Clematis tangutica
- Clematis terniflora
- Clematis texensis
- Clematis tibetana
- Clematis × triternata
- Clematis uncinata
- Clematis × vedrariensis
- Clematis viorna
- Clematis virginiana
- Clematis vitalba
- Clematis viticella
Editorial Note
Bean’s Clematis verticillaris is now considered a variety of this species.
var. occidentalis
Synonyms
Atragene americana Sims
Clematis verticillaris DC.
A climbing shrub of the Atragene section 6 to 8 ft high; young stems slightly ribbed, glabrous, becoming much enlarged at the joints with age. Leaves ternate, being composed of three leaflets on a common stalk 2 to 3 in. long; leaflets ovate or heart-shaped, 1 to 2 in. long, coarsely toothed or entire, with a little loose down about the veins and stalks when young. Flower solitary on a stalk about 3 in. long, purple or purplish blue, 2 to 3 in. across. Sepals four, thin, lance-shaped, pointed, prominently veined, downy, especially at the margins; sepals about 5⁄8 in. long. Seed-vessel surmounted by a feathery style about 11⁄2 in. long. Bot. Mag., t. 887.
Native of eastern N. America; introduced in 1797. It is most nearly allied to the European C. alpina, producing its flowers in May from the joints of the previous year’s wood, and having petals or petal-like organs between the sepals and stamens. It is, however, quite distinct in having but three leaflets to each leaf, and these have not the deep, handsome toothing of C. alpina. C. verticillaris is now very rare in gardens, as it is said to be also in a wild state.