Houstonia pusillaSchoepf

tiny bluet

WFO wfo-0000215245 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Houstonia pusilla, photographed by Ryan Sorrells
fig. a Ryan Sorrells, CC BY 4.0 / 2022-04-25 / obs. 191152632
Houstonia pusilla, photographed by Annika Lindqvist
fig. b Annika Lindqvist, CC BY 4.0 / obs. 186649294
Houstonia pusilla, photographed by Taro Ietaka
fig. c Taro Ietaka, CC BY 4.0 / obs. 188554637
Houstonia pusilla, photographed by T. J. Crow
fig. d T. J. Crow, CC BY-SA 4.0 / obs. 186966553
Houstonia pusilla, photographed by Anne Coleman
fig. e Anne Coleman, CC BY 4.0 / obs. 187886252
Houstonia pusilla, photographed by Brandon Corder
fig. f Brandon Corder, CC BY 4.0 / obs. 186408113
Houstonia pusilla, photographed by stephen
fig. g stephen, CC BY 4.0 / obs. 186968750
Houstonia pusilla, photographed by Zac Peterson
fig. h Zac Peterson, CC BY 4.0 / obs. 187834797

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 = 2,184 observations

Peak flowering in Mar, from 2,184 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 18 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.

  • Ereicoctis crassifolia Kuntze
  • Hedyotis caerulea var. minima (Beck) Fosberg
  • Hedyotis caerulea var. minor (Michx.) Torr. & A.Gray
  • Hedyotis caerulea var. patens Ellis
  • Hedyotis crassifolia Raf.
  • Hedyotis crassifolia f. albiflora (Standl.) W.H.Lewis
  • Hedyotis geniculata Raf.
  • Hedyotis minima (Beck) Torr. & A.Gray
  • Houstonia caerulea var. minor (Michx.) Pursh
  • Houstonia geniculata Raf.
  • Houstonia linnaei var. minor Michx.
  • Houstonia minima Beck
  • Houstonia minor Britton
  • Houstonia patens Elliott
  • Houstonia pusilla f. albiflora Standl.
  • Houstonia pusilla f. rosea Steyerm.
  • Oldenlandia caerulea var. patens (Elliott) M.Gómez
  • Oldenlandia patens (Elliott) Chapm.

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.