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Elodea is a genus of 6 species of aquatic plants often called the waterweeds described as a genus in 1803. Classified in the frog's-bit family (Hydrocharitaceae), Elodea is native to the Americas [2] and is also widely used as aquarium vegetation and laboratory demonstrations of cellular activities. It lives in fresh water. [3]
Nuttall, 1818. Elodea canadensis (American waterweed or Canadian waterweed or pondweed) is a perennial aquatic plant, or submergent macrophyte, native to most of North America. [1][2][3] It has been introduced widely to regions outside its native range and was first recorded from the British Isles in about 1836. [4]
Hydrilla. Rich. Hydrilla (waterthyme) is a genus of aquatic plant, usually treated as containing just one species, Hydrilla verticillata, though some botanists divide it into several species. It is native to the cool and warm waters of the Old World in Asia, Africa and Australia, with a sparse, scattered distribution; in Australia from Northern ...
Egeria densa is an aquatic plant growing in water up to 4 m (13 ft) deep, with trailing stems to 2 m (6.6 ft) or more long, producing roots at intervals along the stem. The leaves are produced in whorls of four to eight, 1–4 cm (0.39–1.57 in) long and 2–5 mm (0.079–0.197 in) broad, with a pointed leaf tip. The stem system of the plant ...
The starting point of Scenedesmus and related algae is in 1820, when Pierre Jean François Turpin observed these algae under a microscope. He classified them under the diatom genus Achnanthes; later authors moved them to different groups, until it was finally classified as a green alga.
Egeria is found in many temperate and subtropical regions throughout the world as an introduced, or "alien", species, meaning a species that does not originate from the area in which it is found. In many places, particularly in Europe, fast-growing, adaptable plants such as Egeria can spread quickly and cause major damage to native plants and ...
Euglena is a genus of single cell flagellate eukaryotes. It is the best known and most widely studied member of the class Euglenoidea, a diverse group containing some 54 genera and at least 200 species. [1][2] Species of Euglena are found in fresh water and salt water. They are often abundant in quiet inland waters where they may bloom in ...
Triangular, wedge-shaped, stem attaches to point. cuneiform. whole leaf. Narrowly triangular, widest on the opposite end from the stem, with the corners at that end rounded. cuspidate. cuspidatus. leaf tip. With a sharp, elongated, rigid tip; tipped with a cusp. deltoid, deltate.