<span class="searchmatch">lappae</span> inflection of lappa: nominative/vocative plural genitive/dative singular...
Proto-Slavic *lopěnъ (“burdock”) is also suggestive. lappa f (genitive <span class="searchmatch">lappae</span>); first declension burdock First-declension noun. lappāceus “lappa”, in...