Calystegia soldanella(L.) R.Br.

Sea Bindweed

WFO wfo-0001298858 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Calystegia soldanella, photographed by Phil James
fig. a Phil James, CC BY 4.0 / 2022-06-07 / obs. 204221101

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.

Flowering n = 2,343 observations

Flowering observations of Calystegia soldanella by month
MonthObservations
Jan113
Feb63
Mar66
Apr252
May585
Jun503
Jul144
Aug37
Sep16
Oct80
Nov219
Dec265

Peak flowering in May, from 2,343 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 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.

  • Calystegia reniformis R.Br.
  • Calystegia soldanelloides Makino

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.