Marah macrocarpa(Greene) Greene

Chilicothe

WFO wfo-0001300996 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Marah macrocarpa, photographed by Millie Basden
fig. a Millie Basden, CC BY 4.0 / 2022-04-09 / obs. 187176412
Marah macrocarpa, photographed by velodrome
fig. b velodrome, CC BY 4.0 / obs. 201768272
Marah macrocarpa, photographed by James C. Davis
fig. c James C. Davis, CC BY-SA 4.0 / obs. 192692880
Marah macrocarpa, photographed by Elly Poretsky
fig. d Elly Poretsky, CC BY 4.0 / obs. 187204652
Marah macrocarpa, photographed by Marc Whitaker
fig. e Marc Whitaker, CC BY 4.0 / obs. 186277134
Marah macrocarpa, photographed by velodrome
fig. f velodrome, CC BY 4.0 / obs. 182789546
Marah macrocarpa, photographed by Amanda Fisher
fig. g Amanda Fisher, CC BY 4.0 / obs. 200663663
Marah macrocarpa, photographed by James C. Davis
fig. h James C. Davis, CC BY-SA 4.0 / obs. 185627521

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.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 1,358 observations

Peak flowering in Feb, from 1,358 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 6 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.

  • Echinocystis macrocarpa Greene
  • Marah leptocarpa (Greene) Greene
  • Marah macrocarpa var. macrocarpa
  • Megarrhiza macrocarpa (Greene) Tidestr.
  • Micrampelis leptocarpa Greene
  • Micrampelis macrocarpa Greene

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.

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