Clematis viornaL.

vasevine

WFO wfo-0000610894 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Clematis viorna, photographed by Eric Knight
fig. a Eric Knight, CC BY 4.0 / 2022-04-28 / obs. 191922463
Clematis viorna, photographed by Yann Kemper
fig. b Yann Kemper, CC0 1.0 / obs. 140747129
Clematis viorna, photographed by Tom Field
fig. c Tom Field, CC BY 4.0 / obs. 146705721
Clematis viorna, photographed by Tom Field
fig. d Tom Field, CC BY 4.0 / obs. 136363032
Clematis viorna, photographed by kcthetc1
fig. e kcthetc1, CC0 1.0 / obs. 130367111
Clematis viorna, photographed by Elias
fig. f Elias, CC BY 4.0 / obs. 178219656
Clematis viorna, photographed by Brian Finzel
fig. g Brian Finzel, CC BY-SA 4.0 / obs. 343190828
Clematis viorna, photographed by Christopher Zacharias
fig. h Christopher Zacharias, CC BY 4.0 / obs. 46122679

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 18 botanical countries

Regions where Clematis viorna is native: Alabama, Arkansas, Delaware, District of Columbia, Georgia, Illinois, Indiana, Kentucky, Maryland, Mississippi, Missouri, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Virginia, West Virginia AlabamaArkansasGeorgiaIllinoisIndianaKentuckyMarylandMississippiMissouriNorth CarolinaOhioPennsylvaniaSouth CarolinaTennesseeVirginiaWest Virginia DelawareDistrict of Columbia
Native distribution of Clematis viorna, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Alabama ALA NORTHERN AMERICA
Arkansas ARK
Delaware DEL
District of Columbia WDC
Georgia GEO
Illinois ILL
Indiana INI
Kentucky KTY
Maryland MRY
Mississippi MSI
Missouri MSO
North Carolina NCA
Ohio OHI
Pennsylvania PEN
South Carolina SCA
Tennessee TEN
Virginia VRG
West Virginia WVA

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 150 in flower of 169 examined

Peak flowering in Jun. Each bar is the share of Clematis viorna observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 150 of 169 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 8 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 19 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Clematis beadlei (Small) R.O.Erickson
  • Clematis flaccida Small ex Rydb.
  • Clematis gattingeri Small
  • Clematis texensis var. parviflora Lavallée
  • Clematis viorna var. flaccida (Small ex Rydb.) R.O.Erickson
  • Clematis viorna var. flavida Kuntze
  • Clematis viorna var. membranacea Kuntze
  • Clematis viorna var. obtusifoliola Kuntze
  • Clematis viorna var. parviflora (Lavallée) Kuntze
  • Clematis viorna var. segreziensis Kuntze
  • Clematis viorna var. viorna
  • Coriflora gattingeri (Small) W.A.Weber
  • Coriflora viorna (L.) W.A.Weber
  • Viorna beadlei Small
  • Viorna flaccida (Small) Small
  • Viorna gattingeri (Small) Small
  • Viorna ridgwayi Standl.
  • Viorna urnigera Spach
  • Viorna viorna Small

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.