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Vick, Albert F. W.
Clematis occidentalis var. occidentalis
Clematis occidentalis (Hornem.) DC. var. occidentalis
Purple clematis, Western blue virginsbower
Synonym(s): Atragene americana, Atragene occidentalis, Clematis verticillaris, Clematis verticillaris var. cacuminis, Clematis verticillaris var. grandiflora
USDA Symbol: CLOCO
USDA Native Status: L48 (N), CAN (N)
Purple clematis climbs to a length of 20 ft. with groups of three-parted, compound leaves and large, purplish-blue, bell-shaped flowers at intervals along the stalk. The flowers are followed by a silvery plume-like cluster of feathery achenes. Old wood is exfoliating – red-brown to purple.
Plant CharacteristicsDuration: Perennial Habit: Vine Size Notes:
Climber Fruit: Size Class:
Bloom InformationBloom Color: Blue , Purple
Bloom Time: May , Jun
, WV Canada: AB
, ON Native Distribution:
E. Que. to Man., s. to n.w. NC,
U.P. of MI,
Jo Daviess Co., IL
& n.e. IA Native Habitat:
River banks; rocky woods
Growing ConditionsLight Requirement: Part Shade , Shade
Soil Moisture: Moist
Soil pH: Circumneutral (pH 6.8-7.2)
Soil Description: Cool, limy, humus-rich soils.
Conditions Comments: Subject to insects and blight.
BenefitUse Wildlife: Low
Warning: POISONOUS PARTS: All parts. Severe pain in mouth if eaten; skin irritation if touched or inhaled. Symptoms include burning sensation of mouth and mouth ulcers; skin redness and burning sensation. Toxic Principle: Anemonin.
The name Clematis is the Greek word for long, easily bent branches (Andy Fyon)
Conspicuous Flowers: yes
PropagationDescription: Propagation is by softwood cuttings, division, and seed.
Seed Collection: Not Available
Seed Treatment: A 60-180 day period of cold-moist stratification at 33-40 degrees aids in the germination of stored seeds.
Commercially Avail: yes
Record Last Modified: 2007-01-01
Research By: TWC Staff