Hydrocharitaceae
Waterthyme
Hydrilla verticillata
- Family
- Hydrocharitaceae
- Genus
- Hydrilla
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Common names
By language (16)
- Chinese
- 水王孫, 黑藻, 水王孙, 滇绣球, 罗氏轮叶黑藻, 轮叶黑藻, 光果黑藻
- Czech
- Přeslenice vodní
- English
- Waterthyme, Florida-elodea, Hydrilla, Indian stargrass, Water-thyme
- German
- Grundnessel, Quirlblättrige Grundnessel
- Hindi
- हाइड्रिल्ला
- hsb
- Wšědna potopka
- Japanese
- クロモ
- Kazakh
- Bolbır, Болбыр, بولبىر, Гидрилла
- Korean
- 검정말, 검정말속
- Lithuanian
- Ežerutė
- Polish
- Przesiąkra okółkowa
- Portuguese
- Hydrilla
- Spanish
- Hydrilla, Epigynanthus, Hydrospondylus, Ixia aquatica
- Thai
- สาหร่ายหางกระรอก
- Vietnamese
- Rong gai
- Welsh
- Ffugalaw gwelw
Synonyms
- Elodea verticillata (L.f.) F.Muell.
- Hydora lithuanica (Besser ex Rchb.) Besser
- Hydrilla angustifolia Hassk.
- Hydrilla dentata Casp.
- Hydrilla dentata var. pomeranica (Rchb.) Casp.
- Hydrilla lithuanica (Rchb.) Dandy
- Hydrilla najadifolia Zoll. & Moritzi
- Hydrilla ovalifolia Rich.
- Hydrilla roxburghii Steud.
- Hydrilla verticillata var. crispa Casp.
- Hydrilla verticillata var. roxburghii Casp.
- Hydrospondylus submersus Hassk.
- Serpicula verticillata L.f.
- Udora lithuanica Rchb.
- Udora lithuanica Andrz. ex Besser
- Udora pomeranica Rchb.
- Udora verticillata (L.f.) Spreng.
- Vallisneria verticillata (L.f.) Roxb.
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Lower 48 states: introduced
Photos
Photo: Darkmax, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Darkmax, CC BY-SA 3.0, from Wikimedia Commons 
Photo: J.M.Garg, CC BY 3.0, from Wikimedia Commons 
Photo: J.M.Garg, CC BY 3.0, from Wikimedia Commons 
Photo: Yercaud-elango, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Yercaud-elango, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Yercaud-elango, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Yercaud-elango, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons
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.