Calycocarpum lyonii(Pursh) Nutt. ex A.Gray

cupseed

WFO wfo-0000581872 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Calycocarpum lyonii, photographed by Laura Clark
fig. a Laura Clark, CC BY 4.0 / 2017-03-28 / obs. 6779014
Calycocarpum lyonii, photographed by mayfly1963
fig. b mayfly1963, CC BY 4.0 / obs. 8627632
Calycocarpum lyonii, photographed by John Kees
fig. c John Kees, CC0 1.0 / obs. 203111159
Calycocarpum lyonii, photographed by John Kees
fig. d John Kees, CC0 1.0 / obs. 198484478
Calycocarpum lyonii, photographed by John Kees
fig. e John Kees, CC0 1.0 / obs. 196673301
Calycocarpum lyonii, photographed by John Kees
fig. f John Kees, CC0 1.0 / obs. 135642597
Calycocarpum lyonii, photographed by John Kees
fig. g John Kees, CC0 1.0 / obs. 133717770
Calycocarpum lyonii, photographed by John Kees
fig. h John Kees, CC0 1.0 / obs. 130161716

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 14 botanical countries

Regions where Calycocarpum lyonii is native: Alabama, Arkansas, Florida, Georgia, Indiana, Kansas, Kentucky, Louisiana, Mississippi, Missouri, North Carolina, Oklahoma, South Carolina, Tennessee AlabamaArkansasFloridaGeorgiaIndianaKansasKentuckyLouisianaMississippiMissouriNorth CarolinaOklahomaSouth CarolinaTennessee
Native distribution of Calycocarpum lyonii, 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.
RegionTDWG codeContinent
Alabama ALA NORTHERN AMERICA
Arkansas ARK
Florida FLA
Georgia GEO
Indiana INI
Kansas KAN
Kentucky KTY
Louisiana LOU
Mississippi MSI
Missouri MSO
North Carolina NCA
Oklahoma OKL
South Carolina SCA
Tennessee TEN

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.

Where it actually grows measured, from 200 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -2.6 °C 1.2 °C 6.9 °C
Warmest month, mean daily high 31.0 °C 32.0 °C 33.0 °C
Annual rainfall 1,165 mm 1,379 mm 1,771 mm
Rainfall in the driest quarter 222 mm 278 mm 381 mm

It is found where winters bring light 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 200 research-grade observations of Calycocarpum lyonii 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.

Also published as 2 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.

  • Menispermum dubium Muhl. ex Raf.
  • Menispermum lyonii Pursh

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.