Plate 1 figs. a–h · 7 observations
This species has been photographed under an open licence only 7 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.
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 52 botanical countries
| Region | TDWG code | Continent |
|---|---|---|
| Algeria | ALG | AFRICA |
| Azores | AZO | |
| Botswana | BOT | |
| Burkina | BKN | |
| Burundi | BUR | |
| Cameroon | CMN | |
| Cape Provinces | CPP | |
| Central African Republic | CAF | |
| Chad | CHA | |
| Congo | CON | |
| DR Congo | ZAI | |
| Egypt | EGY | |
| Eritrea | ERI | |
| Eswatini | SWZ | |
| Ethiopia | ETH | |
| Free State | OFS | |
| Gabon | GAB | |
| Gulf of Guinea Is. | GGI | |
| Ivory Coast | IVO | |
| Kenya | KEN | |
| KwaZulu-Natal | NAT | |
| Lesotho | LES | |
| Libya | LBY | |
| Madagascar | MDG | |
| Malawi | MLW | |
| Mali | MLI | |
| Mozambique | MOZ | |
| Namibia | NAM | |
| Niger | NGR | |
| Nigeria | NGA | |
| Northern Provinces | TVL | |
| Rwanda | RWA | |
| Senegal | SEN | |
| Somalia | SOM | |
| Sudan-South Sudan | SUD | |
| Tanzania | TAN | |
| Tunisia | TUN | |
| Uganda | UGA | |
| Zambia | ZAM | |
| Zimbabwe | ZIM | |
| Corse | COR | EUROPE |
| Greece | GRC | |
| Italy | ITA | |
| Kriti | KRI | |
| Portugal | POR | |
| Sardegna | SAR | |
| Sicilia | SIC | |
| Spain | SPA | |
| Gulf States | GST | ASIA-TEMPERATE |
| Iran | IRN | |
| Türkiye | TUR | |
| Yemen | YEM |
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.
Where it actually grows measured, from 78 observations
| Condition | 5th percentile | Median | 95th percentile |
|---|---|---|---|
| Coldest month, mean daily low | 4.7 °C | 9.0 °C | 17.3 °C |
| Warmest month, mean daily high | 24.4 °C | 30.0 °C | 34.0 °C |
| Annual rainfall | 336 mm | 625 mm | 1,055 mm |
| Rainfall in the driest quarter | 2 mm | 21 mm | 143 mm |
It is barely found anywhere that freezes. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 78 research-grade observations of Potamogeton schweinfurthii 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.
Also published as 6 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.
- Potamogeton bunyonyiensis Denny & Lye
- Potamogeton capensis Scheele ex A.Benn.
- Potamogeton capensis Schelle ex Hagstr.
- Potamogeton promontoricus Hagstr.
- Potamogeton repens Hagstr.
- Potamogeton venosus A.Benn.
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.