graceful fern
... that although the graceful fern is native to the tropics, it can survive temperatures as low as −7 °C (19 °F)?
... that although the <b id="mwAVM"><a href="./Niphidium_crassifolium" id="mwAVQ" rel="mw:WikiLink" title="Niphidium crassifolium">graceful fern</a></b> is native to the tropics, it can survive temperatures as low as <span about="#mwt18" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"-7"},"2":{"wt":"C"},"3":{"wt":"F"}},"i":0}}]}' id="mwAVU" typeof="mw:Transclusion">−7</span><span about="#mwt18" typeof="mw:Entity"> </span><span about="#mwt18">°C (19</span><span about="#mwt18" typeof="mw:Entity"> </span><span about="#mwt18">°F)</span>?