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
Belene Nuclear Power Plant plant. The aim of the government is to complete the project through funding by a strategic investor, what interest has so far been declared by several companies. Minister of Energy should develop an investor selection procedure and propose options for structuring the project by 31 October 2018. According to the Minister, the plant can be completed within 7-8 years. The AES 92 variant proposed for implementation at the Belene NPP site is a new generation VVER type reactor that has been licensed by regulatory authorities in Russia. It has been declared to meet all safety requirements as well as recommendations