Severn River heath-myrtle
... that the Severn River heath-myrtle is found only along a single ridge?
... that the <b id="mwBic"><a href="./Micromyrtus_grandis" id="mwBig" rel="mw:WikiLink" title="Micromyrtus grandis">Severn River heath-myrtle</a></b> is found only along a single ridge?