Marah fabacea(Naudin) Greene

California manroot

WFO wfo-0001300992 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Marah fabacea, photographed by Adam J. Searcy
fig. a Adam J. Searcy, CC BY 4.0 / 2022-05-24 / obs. 200920180
Marah fabacea, photographed by rappman
fig. b rappman, CC BY 4.0 / obs. 200350620
Marah fabacea, photographed by Mary K. Hanson
fig. c Mary K. Hanson, CC BY 4.0 / obs. 198192409
Marah fabacea, photographed by er-birds
fig. d er-birds, CC BY 4.0 / obs. 197300498
Marah fabacea, photographed by Jeremiah Degenhardt
fig. e Jeremiah Degenhardt, CC BY 4.0 / obs. 188437456
Marah fabacea, photographed by Chuck Wilson
fig. f Chuck Wilson, CC0 1.0 / obs. 188940920
Marah fabacea, photographed by Garth Harwood
fig. g Garth Harwood, CC BY 4.0 / obs. 192269578
Marah fabacea, photographed by Chuck Wilson
fig. h Chuck Wilson, CC0 1.0 / obs. 187229885

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 = 2,432 observations

Peak flowering in Mar, from 2,432 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 12 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 fabacea Naudin
  • Echinocystis fabacea var. agrestis Congdon
  • Echinocystis fabacea var. inermis (Congdon) Jeps.
  • Echinocystis inermis Congdon
  • Echinocystis scabrida Eastw.
  • Marah fabacea var. agrestis (Greene) Stocking
  • Marah fabacea var. fabacea
  • Marah inermis (Congdon) Dunn
  • Megarrhiza californica Torr.
  • Micrampelis fabacea (Naudin) Greene
  • Micrampelis fabacea var. agrestis Greene
  • Micrampelis fabaceus var. agrestis 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.