Penthorum sedoides (ditch stonecrop)

Plate 1 figs. a–h

Penthorum sedoides, photographed by Yann Kemper — fig. a Yann Kemper, CC0 1.0 / 2021-09-19 / obs. 158474937

Penthorum sedoides, photographed by botanygirl — fig. b botanygirl, CC BY 4.0 / obs. 175287340

Penthorum sedoides, photographed by Ryan Sorrells — fig. c Ryan Sorrells, CC BY 4.0 / obs. 205674661

Penthorum sedoides, photographed by Eric Knight — fig. e Eric Knight, CC BY 4.0 / obs. 161552507

Penthorum sedoides, photographed by Renato Robert — fig. g Renato Robert, CC BY 4.0 / obs. 156821509

Penthorum sedoides, photographed by Tom Field — fig. h Tom Field, CC BY 4.0 / obs. 156467531

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 = 719 observations

194

385

105

Flowering observations of Penthorum sedoides by month
Month	Observations
Jan	0
Feb	0
Mar	0
Apr	0
May	0
Jun	16
Jul	194
Aug	385
Sep	105
Oct	18
Nov	1
Dec	0

Peak flowering in Aug, from 719 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.

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
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.