Cynanchum laeve(Michx.) Pers.

honeyvine

WFO wfo-0000633224 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Cynanchum laeve, photographed by Ryan Sorrells
fig. a Ryan Sorrells, CC BY 4.0 / 2022-06-07 / obs. 205621342
Cynanchum laeve, photographed by Emily Summerbell
fig. b Emily Summerbell, CC BY 4.0 / obs. 204107598
Cynanchum laeve, photographed by Melinda Soltys
fig. c Melinda Soltys, CC0 1.0 / obs. 162302250
Cynanchum laeve, photographed by John Abrams
fig. d John Abrams, CC BY 4.0 / obs. 162055960
Cynanchum laeve, photographed by Annika Lindqvist
fig. e Annika Lindqvist, CC BY 4.0 / obs. 157247880
Cynanchum laeve, photographed by Thomas Koffel
fig. f Thomas Koffel, CC BY 4.0 / obs. 155513341
Cynanchum laeve, photographed by Judy Gallagher
fig. g Judy Gallagher, CC BY-SA 4.0 / obs. 156005350
Cynanchum laeve, photographed by Melissa McMasters
fig. h Melissa McMasters, CC BY 4.0 / obs. 162004461

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 29 botanical countries

Regions where Cynanchum laeve is native: Alabama, Arkansas, Delaware, District of Columbia, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Jersey, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, West Virginia AlabamaArkansasFloridaGeorgiaIllinoisIndianaIowaKansasKentuckyLouisianaMarylandMichiganMinnesotaMississippiMissouriNebraskaNew JerseyNew YorkNorth CarolinaOhioOklahomaPennsylvaniaSouth CarolinaTennesseeTexasVirginiaWest Virginia DelawareDistrict of Columbia
Native distribution of Cynanchum laeve, 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
Florida FLA
Georgia GEO
Illinois ILL
Indiana INI
Iowa IOW
Kansas KAN
Kentucky KTY
Louisiana LOU
Maryland MRY
Michigan MIC
Minnesota MIN
Mississippi MSI
Missouri MSO
Nebraska NEB
New Jersey NWJ
New York NWY
North Carolina NCA
Ohio OHI
Oklahoma OKL
Pennsylvania PEN
South Carolina SCA
Tennessee TEN
Texas TEX
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 362 in flower of 645 examined

Peak flowering in Aug. Each bar is the share of Cynanchum laeve 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. 362 of 645 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 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.

Where it actually grows measured, from 2,026 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -8.2 °C -2.8 °C 3.8 °C
Warmest month, mean daily high 28.5 °C 30.8 °C 34.4 °C
Annual rainfall 882 mm 1,086 mm 1,339 mm
Rainfall in the driest quarter 83 mm 214 mm 268 mm

It is found where winters bring hard frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 2,026 research-grade observations of Cynanchum laeve that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 11 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.

  • Ampelamus albidus (Nutt.) Britton
  • Ampelamus laevis (Michx.) Krings
  • Ampelamus riparius Raf.
  • Ampelanus riparius Raf.
  • Enslenia albida Nutt.
  • Enslenia cinerea Spreng.
  • Gonolobus laevis Michx.
  • Gonolobus nuttallianus Spreng.
  • Gonolobus nuttallii Decne.
  • Gonolobus viridiflorus Nutt.
  • Vincetoxicum gonocarpos var. laevis (Michx.) Britton

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. USDA PLANTS Database. common name, checklist symbol CYLA. public domain. 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.