Kalmar “genus” tana nufin rabe-raben haraji a cikin ilmin halitta, wanda ya ƙunshi gungun jinsin da ke da alaƙa da juna waɗanda suke da kakanni ɗaya. iyali Diapensiaceae, 'yan asali zuwa sanyi sanyi yankuna na arewacin hemisphere. Yawanci suna da ganyen fata, masu siffar cokali kuma suna samar da ƙananan furanni masu siffar tauraro.Saboda haka, "genus Diapensia" yana nufin rarrabuwar haraji na rukunin tsire-tsire masu tsire-tsire a cikin dangin Diapensiaceae waɗanda ke da halaye iri ɗaya. kuma suna da alaƙa ta hanyar kakanni ɗaya.