Jove's beard
... that many people still plant Jove's beard on the roofs of houses, as Charlemagne recommended?
... that many people still plant <i id="mwCag"><b id="mwCak"><a href="./Sempervivum_tectorum" id="mwCao" rel="mw:WikiLink" title="Sempervivum tectorum">Jove's beard</a></b></i> on the roofs of houses, as <a href="./Charlemagne" id="mwCas" rel="mw:WikiLink" title="Charlemagne">Charlemagne</a> recommended?