Curly Clematis, Swamp Leather Flower, Blue Jasmine, Marsh Flower

Clematis crispa

Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Clematis (KLEM-uh-tiss) (Info)
Species: crispa (KRISP-uh) (Info)
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4-6 ft. (1.2-1.8 m)


18-24 in. (45-60 cm)


USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Bloom Color:




White/Near White

Flower Fragrance:

No fragrance

Bloom Shape:




Bloom Diameter:

Small - less than 2 inches (5 cm)

Bloom Time:

Mid Summer

Late Summer/Early Fall

Mid Fall

Sun Exposure:

Sun to Partial Shade

Other details:

Unknown - Tell us


Unknown - Tell us

Pruning Groups:

Group 3 - Summer/Fall bloomers; prune hard in early spring

Patent Information:


Propagation Methods:

By dividing the rootball

From herbaceous stem cuttings

From softwood cuttings

From semi-hardwood cuttings

From seed; direct sow outdoors in fall

By grafting

By simple layering

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:

Bartow, Florida

Brooksville, Florida

Daytona Beach, Florida

Riverview, Florida

Hephzibah, Georgia

Townsend, Georgia

Louisville, Kentucky

Lafayette, Louisiana

Merryville, Louisiana

Palmetto, Louisiana

Zachary, Louisiana

Eveleth, Minnesota

Geneva, New York

Holly Ridge, North Carolina

Portland, Oregon

Conway, South Carolina

Christiana, Tennessee

Beaumont, Texas

Fate, Texas

Plano, Texas

Prosper, Texas

Alexandria, Virginia

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Gardeners' Notes:


On Jan 16, 2015, sladeofsky from Louisville, KY (Zone 6b) wrote:

This lovely US native grows naturally in zones 6b to 9a, but it is probably hardy to 5a. It enjoys moist (not wet) soils. Increasingly it is being used to hybridize a plethora of lovely bell shaped clems for the garden. But the straight species is worth growing I it's own right. Although vigorous, it tends to be loose and sparse, leading some to refer to it as one of the "see-through vines." Although like all the American Clematis, there is variability in color, it tends to be white trimmed in blue. If you are interested in trying your own hand at breeding, this is one you should have. It is a leaner or scrambler, and a wonderful addition to roses, hydrangeas and can soften conifers and add a subtle splash of conifers. Just be careful not to plant it in a shrub that requires constant sheer... read more


On Dec 13, 2010, annhelen from Townsend, GA wrote:

This is a beautiful thing and grows wild here in coastal Georgia.


On Oct 1, 2003, TerriFlorida from Plant City, FL wrote:

I bought this from a native plants nursery here in Florida, and got the medium blue type. The flowers are lovely, small and bell shaped with recurved petal tips, very decorative. It is more a sprawler than a climber, and it does prefer partial shade down here, woodland soil, and moisture. It will withstand occasional flooding but isn't happy about that. I wish I had a photo of its flowers. If you have the chance to grow this gentle beauty, take it!