Polish wrzos

← Irish fraoch (cognate)

← Ancient Greek ἐρείκη (cognate)

← Proto-Balto-Slavic *werˀź- (inherited)

← Proto-Balto-Slavic *wirˀź- (mention)

← Lithuanian vìržis (cognate)

← Latvian virzis (cognate)

← Proto-Slavic *vȇrsъ (inherited)

→ Latvian virsis (cognate)

→ Polish wrzesień (affix)

→ Polish wrzosowisko (suffix)

→ Polish wrzosowiec (suffix)

→ Serbo-Croatian vres (cognate)

→ Serbo-Croatian врес (cognate)

→ Serbo-Croatian vrijes (cognate)

→ Serbo-Croatian вријес (cognate)