Oxydendrum arboreum (sourwood)

Plate 1 figs. a–h

Oxydendrum arboreum, photographed by Leila Dasher — fig. a Leila Dasher, CC BY 4.0 / 2022-06-03 / obs. 203101248

Oxydendrum arboreum, photographed by Brian Finzel — fig. b Brian Finzel, CC BY-SA 4.0 / obs. 202607287

Oxydendrum arboreum, photographed by Eric Knight — fig. c Eric Knight, CC BY 4.0 / obs. 191207334

Oxydendrum arboreum, photographed by Clay Gibbons — fig. d Clay Gibbons, CC BY 4.0 / obs. 197936479

Oxydendrum arboreum, photographed by Joseph Aubert — fig. e Joseph Aubert, CC BY 4.0 / obs. 204034399

Oxydendrum arboreum, photographed by Alan Weakley — fig. f Alan Weakley, CC0 1.0 / obs. 201379928

Oxydendrum arboreum, photographed by Yann Kemper — fig. g Yann Kemper, CC0 1.0 / obs. 184967229

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 = 469 observations

257

152

Flowering observations of Oxydendrum arboreum by month
Month	Observations
Jan	0
Feb	1
Mar	0
Apr	0
May	13
Jun	257
Jul	152
Aug	29
Sep	8
Oct	7
Nov	2
Dec	0

Peak flowering in Jun, from 469 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 1 synonym

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.

Andromeda arborea L.

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.