Asplenium rhizophyllum one collection on sandstone in the Shawnee Hills of Illinois. A triploid hybrid between walking fern and Tutwiler's spleenwort was accidentally produced in culture. A similar plant collected from limestone in Shepherdstown, West Virginia could have originated from the same parents, from an unreduced (diploid) gametophyte of Scott's spleenwort crossed with walking fern, or from an unreduced walking fern gametophyte crossed with ebony spleenwort. In 1813, Henry Muhlenberg listed lobed spleenwort as "Asplenium rhizophyllum" var. "pinnatifidum", although he did not provide a description distinguishing the variety from the typical species. It was described as the species "A. pinnatifidum" by Thomas
Plant Daniel that year. Plant Daniel The Victor J. Daniel Electric Generating Plant is a major 2-gigawatt, four-unit fossil fuel power plant, generating about 1 GWe from two coal-fired subcritical drum-type units and 1 GWe from its two newer, gas-fired combined-cycle units. Plant Daniel is located in Jackson County, near Escatawpa, Mississippi. Named for Victor J. Daniel, Jr., Mississippi Power's fourth president, the plant was designated by Southern Company Services, Inc. Jointly owned by Southern Company subsidiaries Mississippi Power and Gulf Power, it is the largest generator of electric power in the state of Mississippi. Construction of Daniel 1 and 2, two