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Aquatic plants require special adaptations for prolonged inundation in water, and for floating at the water surface. The most common adaptation is the presence of lightweight internal packing cells, aerenchyma , but floating leaves and finely dissected leaves are also common.
Water hyacinth is a free-floating perennial aquatic plant (or hydrophyte) native to tropical and subtropical South America. With broad, thick, glossy, ovate leaves, water hyacinth may rise above the surface of the water as much as 1 m (3 ft) in height.
It floats on the surface of the water, its roots hanging submersed beneath floating leaves. The leaves can measure 2 – 15 cm long and are light green, with parallel venations and wavy margins. [8] The surface of the leaves is covered in short, white hairs which form basket-like structures that can trap air bubbles and increase the plant's ...
Close-up of floating aquatic plants: Spirodela polyrrhiza and Wolffia globosa; the very tiny Wolffia plants are under 2 millimetres (0.079 in) long. Wolffia is a genus of aquatic plants with a cosmopolitan distribution. [1] They include the smallest flowering plants on Earth. [2] Commonly called watermeal or rootless duckweed, [3] [4] these ...
Lemnoideae is a subfamily of flowering aquatic plants, known as duckweeds, water lentils, or water lenses. They float on or just beneath the surface of still or slow-moving bodies of fresh water and wetlands .
N. peltata are commonly sold for use in ornamental water gardens. [3] [10] The species is intentionally or accidentally transferred to lakes and rivers outside of its native range. [2] In the United States, the first recorded occurrence of the plant was in 1882 in Massachusetts, [3] and the plant has been sold domestically since the 1930s. [16]
Lemna minor is a floating freshwater aquatic plant, with one, two, three or four leaves each having a single root hanging in the water. As more leaves grow, the plants divide and become separate individuals. The root is 1–2 cm long.
A rosette of water caltrop leaves. The water caltrop's submerged stem reaches 3.7 to 4.6 metres (12 to 15 feet) in length, anchored into the mud by very fine roots. It has two types of leaves: finely divided, feather-like submerged leaves borne along the length of the stem, and undivided floating leaves borne in a rosette at the water's surface.