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6.1.2 Types of plants
1. Floating plants : Plants have their foliage (leaves) above the surface of water with roots hanging free. Ex. Eicchornia, Pistia, Spirodela, Lemna, Azolla, Wolffia, Salvinia, Riccia sp. 2. Emergent plants : Plants having their leaves and flowers above the water surface but rooted in the bottom. Ex. Nymphaea, Nelumbo, Nymphoides. 3. Submerged plants : Leaves are submerged in the water, may or may not be rooted. Ex. Hydrilla, Ceratophylum, Myriophylum, Ottelia, Bacopa, Ludwigia, Saggitaria, Aponogeton, Cabomba, Limnophila, Ceratopteris. Rooted plants : Hydrilla, Najas, Ottelia, Vallisneria, Potomogeton, Lagarosiphon, Chara, Nitella. Devoid of roots : Ceratophyllum, Utricularia. 4. Marginal plants : They are growing in the shallow areas of the water body (near shore). Ex. Typha, Cyperus, Ipomea, Eleocharis, Cryptocoryne, Echinodorus. |