Occurrence Majority of them are fresh water. They are also found on moist soil. They form dark green mats. Fig: Thallus of Vaucheria General structure Vegetative structure The thallus is filamentous. The filament is cylindrical, branched, tubvlar, erect coenocytic. The filament is attached to
Occurrence Volvox is freshwater algae. It makes water green. It appears in the spring. General structure Vegetative structure Volvox forms colony. The colony of volvox is called coenobium. It is spherical in shape. Each colon v has number of cells from 500 ton 50,000.