Tanım
•common houseleek (Sempervivum tectorum)
Etimoloji
From Middle Dutch donderblat, with a by-form donderbaert (whence the modern obsolete synonym donderbaard). By surface analysis, donder (“thunder”) + blad (“leaf”), perhaps from a folk belief that these plants protected against thunder (as they were commonly planted on roofs: compare the synonyms huislook, daklook and other variants, as well as the taxonomic name, tēctōrum meaning "of roofs"). If…