General. – The Characaeae is the only extant family of an ancient and unique group of nonvascular aquatic plants which are classified as a separate division, the Charophyta (Groves and Bullock-Webster, 1920; Zaneveld, 1940; Imahori, 1954; Bold,...
Aquatic ecosystems face major transformations as humans increasingly alter their environment by introducing exotic species and changing the temperature regime and nutrient availability of freshwater systems. The impacts of such alterations of...
Map of the Falls of the Ohio, including Shippingport, Portland, Jeffersonville, Clarksville, and Louisville. Inserted at end of Sketches of Louisville and its environs: including, among a great variety of miscellaneous matter, a Florula...
