Hydrophytes:
The plants (such as water lily) which are found in fresh water habitat either partly or completely submerged are termed as Hydrophytes. They don't have any difficulty in obtaining water. The stems and leaves of hydrophytes generally lack cuticle. Their stomata are large and present on upper surface of leaves.
Halophytes:
The plants growing in salt marshes close to sea are termed as halophytes eg: glasswort and cord grass. They have to absorb water from such a soil which has higher salt concentration and low water potential. Halophytes cope with this situation by actively absorbing salts into their roots. Cells of roots develop lower water potential which brings in water by osmosis. The excess salt can be stored in cells or excreted out from salt glands on the leaves. Salt secreted by some species help them to trap water vapours from the air which is being absorbed in liquid from by leaf cells.
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