Tutwiler's spleenwort
... that, originally discovered in 1873, Tutwiler's spleenwort became one of the world's rarest ferns in 2007?
... that, originally discovered in 1873, <b id="mwDp0"><a href="./Asplenium_tutwilerae" id="mwDp4" rel="mw:WikiLink" title="Asplenium tutwilerae">Tutwiler's spleenwort</a></b> became one of the world's rarest ferns in 2007?