Potamogetonaceae

Variableleaf pondweed

Potamogeton gramineus L.

Family: Potamogetonaceae
Genus: Potamogeton

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Variableleaf pondweed (Potamogeton gramineus) — FlowerPhoto: Jamie O'Neill, CC BY 4.0, from iNaturalist

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Common names

By language (19)

Belarusian: Урэчнік разналісты, Рдзест злакалісты, Урэчнік злакалісты
Bulgarian: Треволистен ръждавец
Catalan: Potamot graminée
Chinese: 禾叶眼子菜, 禾葉眼子菜
Czech: Rdest trávolistý
Dutch: Ongelijkbladig fonteinkruid
English: Variableleaf pondweed, Various-leaved pondweed, Grass-leaved pondweed
Estonian: Hein-penikeel
Finnish: Heinävita
French: Potamot graminée
German: Gras-Laichkraut, Grasartiges Laichkraut, Potamot graminée
Latvian: Zālainā glīvene
Lithuanian: Potamot graminée
Persian: بارهنگ آبی چمنی
Polish: Rdestnica trawiasta
Romanian: Broscăriță
Russian: Рдест Вольфганга, Рдест злаковидный, Рдест злаколистный, Рдест разнолистный
Swedish: Potamot graminée
Ukrainian: Рдесник злаколистий

Synonyms

Potamogeton argutulus Hagstr.
Potamogeton argutulus f. puyensis Hagstr.
Potamogeton augustani Bellardi
Potamogeton augustanus Balb.
Potamogeton biformoides Papch.
Potamogeton borealis Kihlm.
Potamogeton crassipes Kit. ex Cham. & Schlecht.
Potamogeton delicatulus Bertol.
Potamogeton distachyus Bellardi
Potamogeton falcatus Fryer
Potamogeton gracilis Wolfg.
Potamogeton gramineus f. angermanicus Tiselius
Potamogeton gramineus f. angustifolius Tiselius ex Hagstr.
Potamogeton gramineus f. fluctuans (Tiselius ex Fryer) Hagstr.
Potamogeton gramineus f. gramineus
Potamogeton gramineus f. jemtlandicus Tiselius
Potamogeton gramineus f. longipedunculatus (Mérat) House
Potamogeton gramineus f. marinus Tiselius
Potamogeton gramineus f. maximus (Morong) House
Potamogeton gramineus f. maximus (Morong) House
Potamogeton gramineus f. myriophyllus (J.W.Robbins) House
Potamogeton gramineus f. ovatifolius Tiselius
Potamogeton gramineus f. septentrionalis (Tiselius) Hagstr.
Potamogeton gramineus f. sinuensis Tiselius
Potamogeton gramineus f. stagnalis (Fr.) Hagstr.
Potamogeton gramineus f. terrestris (Schltdl.) D.S.Carp.
Potamogeton gramineus f. wolfgangii (Kihlm.) Hagstr.
Potamogeton gramineus subsp. heterophyllus (Schreb.) K.Richt.
Potamogeton gramineus subsp. heterophyllus Schinz & R.Keller
Potamogeton gramineus subsp. wolfgangii (Kihlm.) Nyman
Potamogeton gramineus subvar. angermanicus Tiselius ex Graebn.
Potamogeton gramineus subvar. angustifolius (Tiselius ex Hagstr.) Graebn.
Potamogeton gramineus subvar. jemtlandicus Tiselius ex Graebn.
Potamogeton gramineus subvar. marinus (Tiselius) Graebn.
Potamogeton gramineus subvar. septentrionalis (Tiselius) Graebn.
Potamogeton gramineus subvar. sinuensis Tiselis ex Graebn.
Potamogeton gramineus var. boreale Laest.
Potamogeton gramineus var. curvifolius Laest.
Potamogeton gramineus var. debilis Tiselius
Potamogeton gramineus var. fluctuans (Tiselius ex Fryer) Tiselius

and 62 more.

Flowers

In flower: June to August (from 13 flowering iNaturalist observations worldwide)
Flower colour: green (USDA PLANTS Database)

Characteristics

Growth habit: Forb/herb
Lifespan: Perennial
In the US and Canada: Alaska: native, Canada: native, Greenland: native, Lower 48 states: native, St. Pierre and Miquelon: native

Photos

FlowerPhoto: Jamie O'Neill, CC BY 4.0, from iNaturalist
Photo: pellaea, CC BY 2.0, from Wikimedia Commons
Photo: Татьяна Горбушина, CC0, from iNaturalist
Photo: Patrice Bracquart, CC BY-SA 4.0, from Pl@ntNet via GBIF
Photo: Gabriel Campbell-Martinez, CC BY 4.0, from iNaturalist
Photo: Tristan He, CC BY-SA 4.0, from Wikimedia Commons
Photo: Oleg Kosterin, CC BY 4.0, from iNaturalist
Photo: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, from Wikimedia Commons
Photo: zebedeugalinha, CC BY 4.0, from iNaturalist
Photo: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, from Wikimedia Commons
Photo: Bruce Cook, CC0, from iNaturalist
Photo: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, from Wikimedia Commons

More in Potamogeton

Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.