a group of plant which survives in moist places (name it)
Hydrophytes (from al-Greek (hygrós) - wet and (phyton) - plant) - plants that live in places with high humidity, and (or) soil. Category hydrophytes allocated on the basis of features of the physiology and morphology of plants, the most characteristic feature of hydrophytes - no mean to limit the expenditure of moisture. Hydrophytes usually are large and thin leaves with a small surface with a protective layer (cuticle), which leads to higher cuticular transpiration; slight thickening of the epidermis, poor net of veins, stomata in leaves are large, but the specific amount per unit area is small. Often the leaves have hairs on the surface of living cells of the epidermis to increase the area of the sheet. Through large stomata plants reach optimal regulation of transpiration. Morphological feature is the presence of hydrophytes leaf stomata specific – hydathodes, which can sweat to drip from a sheet-liquid form. This is necessary for normal functioning of the plant in an atmosphere saturated with water vapor. Allocation of water drops from a sheet called guttation. Among other morphological features of hydrophytes - poorly developed root system, the presence of long stems with underdeveloped mechanical tissue lignification weak vessel walls. These features lead to wilting even small lack of moisture. The most characteristic hygrophytes are herbaceous plants of tropical rainforests. Marsh grasses are usually also referred to as hydrophytes, but for a number of morphological characters, they are different. Because of constant exposure to sunlight and a dry atmosphere they have there a thicker cuticle, which leads to a decrease in cuticular transpiration, and the leaves are usually thicker and less. Sometimes bog plants emit in specific subgroups – helophytes. To close hygrophytes hydrophytes (aquatic plants, submerged bottom) and hydathophytes (aquatic plants, completely or mostly in the water.) Sometimes due to the similarity of the morphology and habitat conditions all these groups is considered as one.