Examples include filamentous algae such as Spirogyra, and waterweeds like the Canadian pondweed (Elodea).
例如像水绵的丝状藻,水蕴草,加拿大的眼子菜(伊乐藻属)等。
英语百科
Elodea canadensis
Elodea canadensis (American or Canadian Waterweed or Pondweed) is a perennial aquatic plant, or submergent macrophyte, native to most of North America. It has been introduced widely to regions outside its native range and was first recorded from the British Isles in about 1836.