Kalmar “genus” tana nufin matakin rarrabuwar haraji a cikin ilmin halitta wanda ake amfani da shi wajen haɗa nau’ukan da ke da alaƙa. Wadannan tsire-tsire an fi sani da bellflowers, kamar yadda furanninsu masu siffar kararrawa ne. Halin halittar Campanula ya ƙunshi kusan nau'ikan 500 na shekara-shekara, biennials, da perennials waɗanda suke 'yan asalin yankuna masu zafi na Arewacin Hemisphere. na rukunin tsire-tsire da aka sani da bellflowers, waɗanda ke cikin dangin Campanulaceae kuma suna da furanni masu siffar kararrawa.