Clematis Species, Bluebill, Vase Vine, Leather Flower

Clematis viorna

Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Clematis (KLEM-uh-tiss) (Info)
Species: viorna
Synonym:Clematis beadlei
Synonym:Clematis flaccida
Synonym:Clematis gattingeri
Synonym:Coriflora gattingeri
Synonym:Coriflora viorna
» View all varieties of Clematis




12-15 ft. (3.6-4.7 m)


36-48 in. (90-120 cm)


USDA Zone 5b: to -26.1 C (-15 F)

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)

Bloom Color:

Magenta (pink-purple)

Flower Fragrance:

Unknown - Tell us

Bloom Shape:


Bloom Diameter:

Small - less than 2 inches (5 cm)

Bloom Time:

Mid Spring

Late Spring/Early Summer

Sun Exposure:

Full Sun

Sun to Partial Shade

Other details:


Unknown - Tell us

Pruning Groups:

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

Patent Information:


Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

From softwood cuttings

From seed; direct sow outdoors in fall

By simple layering

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Unknown - Tell us

Where to Grow:

Grow outdoors year-round in hardiness zone


This plant is said to grow outdoors in the following regions:

Auburn, Alabama

Amana, Iowa

Shawnee Mission, Kansas

Monticello, Kentucky

New Orleans, Louisiana

Eveleth, Minnesota

Saint Paul, Minnesota

Cole Camp, Missouri

Brooklyn, New York

Allentown, Pennsylvania

Barto, Pennsylvania

New Braunfels, Texas

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Gardeners' Notes:


On Jun 30, 2020, BensonGardens from Saint Paul, MN wrote:

Probably my favorite Clematis. I originally purchased this as Texensis but when it flowered it was not that. I had a Clematis nurseryman confirm it as "viorna group" but whether it is the actual species or a cross I cannot say. Researching it online there is a lot of variability in the species so I am just enjoying what I have. If it is happy and you are not overly tidy in the garden it will reseed. From the one I planted I know have about 10 (this has taken about 20 years). I have also started some from seed. They are very slow to mature, I pretty much would rather just surprise myself by finding a new one in the garden. Also they are really tough. I was killing off an overgrown bed to replant it and even though I dug out the vine and treated the bed with two month of solarization... read more


On Oct 19, 2015, wakingdream from Allentown, PA wrote:

After many years of wishing for this plant, (and placing myself on a "waiting list" with an online vendor who after 2 years still did not fulfill my order), I found these vines offered and purchased 2 of them, just in case. Upon arrival, the boxed specimens were in distress and I was dubious about their survival. I placed them into my raised beds with rich soil, developed after years of adding compost. I did not feel they were thriving for the remaining months of the 2014 growing season, however. Light was half shade according to recommendations. Vines over-wintered there. Both sprouted in the spring and were not relocated. They stayed in place and bloomed very well, making lots of healthy, viable seeds which I hope to sprout. I will also consider moving the vines to a new spot to free ... read more


On May 27, 2012, Gascoigne from Shawnee Mission, KS (Zone 5a) wrote:

Very vigorous yet well behaved climbing vine. i bought three seedlings online last year 2011, and my biggest one one, on the north side of my house, is now 7', growing next to clematis 'Walenburg'. I love the texture of the feels just the way it dense styrofoam...and it floats! i'll take a pic soon....i just love this funky took me forever to find it, however, which is why i purchased 3 when i found case i killed one or two. None have died...all are thriving. I have the other two growing through a redbud, and the other through a Don Juan Rose.


On Aug 12, 2009, wetdogfarm from Eveleth, MN (Zone 3a) wrote:

No problem with survival for this species in zone 3a, N. Minnesota.


On Mar 11, 2007, bluespiral from (Zone 7a) wrote:

A little more detail on germination from the 2nd edition of Norman C. Deno's book, Seed Germination Theory and Practice -

If you obtain the seed too late for fall sowing, sow in the dark at 70*F; germination may take about 3 months.


On Jun 14, 2003, vroomp from Marietta, GA (Zone 7a) wrote:

I rescued this plant(actually I got 3) from a construction site in North Georgia where it grows naturally, although sparsely. Grown in full sun it can be treated just like a Jackmanii. Trim old growth in late winter as flowers appear on new growth. Once established, this vine produces flowers for about two months, Late April-June in Zone 7. Quite an agressive grower/climber it can take over a small arbor or trellis in one season.