Diodia virginianaL.

buttonweed

WFO wfo-0000943677 Accepted WFO 2026-06 7 photographs CC0 / CC BY

Plate 1 figs. a–g

Diodia virginiana, photographed by Joseph Aubert
fig. a Joseph Aubert, CC BY 4.0 / 2022-06-11 / obs. 205692599
Diodia virginiana, photographed by CK2AZ
fig. b CK2AZ, CC BY 4.0 / obs. 200990064
Diodia virginiana, photographed by Alison Northup
fig. c Alison Northup, CC BY 4.0 / obs. 204352837
Diodia virginiana, photographed by Raven Dandridge
fig. d Raven Dandridge, CC BY 4.0 / obs. 199555914
Diodia virginiana, photographed by Josiah Londerée
fig. e Josiah Londerée, CC BY 4.0 / obs. 193386437
Diodia virginiana, photographed by Amber M. King
fig. f Amber M. King, CC BY 4.0 / obs. 194483563
Diodia virginiana, photographed by Leila Dasher
fig. g Leila Dasher, CC BY 4.0 / obs. 196996064

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 = 1,639 observations

Peak flowering in Aug, from 1,639 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 13 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.

  • Diodia harperi Small
  • Diodia hirsuta Pursh
  • Diodia hispida Muhl. ex DC.
  • Diodia oblonga Raf.
  • Diodia tetragona Walter
  • Diodia virginiana f. hirsuta (Pursh) Fernald
  • Diodia virginiana f. virginiana
  • Diodia virginiana var. attenuata Fernald
  • Diodia virginiana var. hirsuta (Pursh) Torr. & A.Gray
  • Diodia virginiana var. latifolia Torr. & A.Gray
  • Diodia virginiana var. linnaei Torr. & A.Gray
  • Diodia virginiana var. virginiana
  • Spermacoce virginiana (L.) A.Rich.

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.