Allium validum (Swamp Onion)

Plate 1 figs. a–h

Allium validum, photographed by Michael Warner — fig. a Michael Warner, CC BY 4.0 / 2021-07-04 / obs. 142403973

Allium validum, photographed by Diego Blanco — fig. b Diego Blanco, CC0 1.0 / obs. 156169772

Allium validum, photographed by Peter Garber — fig. c Peter Garber, CC0 1.0 / obs. 141359773

Allium validum, photographed by Don Loarie — fig. d Don Loarie, CC BY 4.0 / obs. 141011337

Allium validum, photographed by Alexander Wentworth — fig. e Alexander Wentworth, CC BY 4.0 / obs. 166057284

Allium validum, photographed by Kayla Sweeten — fig. f Kayla Sweeten, CC BY 4.0 / obs. 150004870

Allium validum, photographed by John Brew — fig. g John Brew, CC BY 4.0 / obs. 143397316

Allium validum, photographed by Steve Woodward — fig. h Steve Woodward, CC0 1.0 / obs. 90361720

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 = 136 observations

Flowering observations of Allium validum by month
Month	Observations
Jan	0
Feb	0
Mar	0
Apr	0
May	0
Jun	12
Jul	77
Aug	41
Sep	6
Oct	0
Nov	0
Dec	0

Peak flowering in Jul, from 136 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.