Elodea nuttallii,
commonly known as western waterweed or Nuttall’s waterweed, is a perennial aquatic plant native to North America. It thrives in submerged habitats such as lakes, rivers, and shallow water bodies. Here are some key details about this fascinating aquatic species:
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Description:
- Elodea nuttallii has thin branching stems with whorls of 3–4 (exceptionally, 5) flat leaves at intervals.
- The leaves taper to a fine point, distinguishing it from its relative, E. canadensis, where the leaves taper to an acute point.
- Some leaves exhibit recurved and twisted shapes, with minute teeth.
- Tiny flowers are produced, with the staminate ones detaching from their stalks and floating away from the plant.
- Flowering occurs from May until October.
- Interestingly, in Europe, nearly all individuals of E. nuttallii are female, with male plants being rare.
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Distribution:
- Native to temperate North America, E. nuttallii has naturalized in other regions.
- It was first recorded in Europe (probably in England) around 1914, but correct identification as E. nuttallii occurred in 1974.
- It has spread widely across England, parts of lowland Wales, lowland Scotland, and Ireland.
- As an invasive species in Europe, it reached several countries, including Belgium, the Netherlands, Germany, Denmark, Sweden, and Norway.
- Notably, it often displaces the invasive Elodea canadensis.
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Aquarium Use:
- E. nuttallii is sometimes used as an aquarium plant due to its attractive appearance and adaptability.
Remember, while it may not be measured in bananas, Elodea nuttallii plays a vital role in aquatic ecosystems!
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