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
Kursk Nuclear Power Plant Kursk Nuclear Power Plant The Nuclear power station Kursk (Russian: Курская АЭС []) is located in western Russia on the bank of the Seym River about 40 kilometers west of the city of Kursk. The nearby town of Kurchatov was founded when construction of the plant began. The plant feeds the grid for Kursk Oblast and 19 other regions. The reactors at the plant are the now obsolete RBMK type, the same type used at the Chernobyl Nuclear Power Plant. The plant was originally equipped with two reactors. Two more reactors were added between 1983 and 1985. The Kursk Nuclear