Baldellia repens

Plate 1 figs. a–h · 3 observations

This species has been photographed under an open licence only 3 times, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Baldellia repens, photographed by Duarte Frade — fig. a Duarte Frade, CC BY 4.0 / 2021-06-18 / obs. 137145023

Baldellia repens, photographed by Jaro Guzinski — fig. b Jaro Guzinski, CC BY 4.0 / obs. 25911113

Baldellia repens, photographed by Michael D. Pirie — fig. f Michael D. Pirie, CC BY 4.0 / obs. 52713813

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.

Native range 10 botanical countries

Native distribution of Baldellia repens, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.

Region	TDWG code	Continent
Belgium	BGM	EUROPE
France	FRA
Great Britain	GRB
Ireland	IRE
Netherlands	NET
Portugal	POR
Spain	SPA
Algeria	ALG	AFRICA
Canary Is.	CNY
Tunisia	TUN

Not drawn on the map: Great Britain. We hold no public-domain boundary for this region, so it is listed rather than guessed at.

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 55 in flower of 58 examined

93%

100%

90%

Proportion of examined Baldellia repens in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	3	3	too few examined
Feb	2	3	too few examined
Mar	2	2	too few examined
Apr	13	14	93%	69% to 99%
May	10	10	100%	72% to 100%
Jun	3	3	too few examined
Jul	10	10	100%	72% to 100%
Aug	1	1	too few examined
Sep	9	10	90%	60% to 98%
Oct	2	2	too few examined
Nov	0	0	too few examined
Dec	0	0	too few examined

Peak flowering in May. Each bar is the share of Baldellia repens observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 55 of 58 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 8 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Where it actually grows measured, from 151 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	0.5 °C	6.4 °C	10.8 °C
Warmest month, mean daily high	20.6 °C	26.0 °C	32.4 °C
Annual rainfall	546 mm	721 mm	1,143 mm
Rainfall in the driest quarter	13 mm	24 mm	182 mm

It is found where winters are cool but frost is light or absent. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 151 research-grade observations of Baldellia repens that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 16 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.

Alisma plantago-aquatica prol. repens (Lam.) Rouy
Alisma ranunculoides var. repens Gray
Alisma ranunculoides var. repens (Lam.) Duby
Alisma ranunculoides var. repens (Lam.) Nyman
Alisma repens Lam.
Baldellia ranunculoides f. repens (Lam.) Markgr.
Baldellia ranunculoides subsp. cavanillesii Molina Abril, A.Galán, J.M.Pizarro & Sard.Rosc.
Baldellia ranunculoides subsp. repens (Lam.) Á.Löve & D.Löve
Baldellia ranunculoides var. repens (Lam.) Gray
Echinodorus ranunculoides f. graminifolius Glück
Echinodorus ranunculoides subsp. natans Glück
Echinodorus ranunculoides subsp. pumilus Glück
Echinodorus ranunculoides subsp. repens (Lam.) K.Richt.
Echinodorus ranunculoides subsp. terrestris Glück
Echinodorus ranunculoides var. repens (Lam.) Duby
Echinodorus repens (Lam.) J.Kern & Reichg.

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.
Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.