Vaucheria
Vaucheria grows on moist sand, soil, and salt marsh banks, sometimes forming dark green mats, or is found submerged in shallow freshwater or marine environments. It is common in streams, rivers, ponds, lakes, ditches, and seeps. Growths are especially abundant in waters with high nutrient levels, such as downstream habitats affected by runoff and nutrient loading from human land use. The genus is most often found in the cooler months between fall and late spring, and has been collected from habitats under ice. Some species are habitat-specific, inhabiting only shallow lakes and ponds or the mud of ditches and bogs, while others are known from diverse habitats. The genus has been collected in much of the continental United States, as well as in Puerto Rico and Trinidad.