Kalmar "genus" tana nufin rabe-raben haraji wanda ke haɗa nau'ikan nau'ikan iri ɗaya. "Strophanthus" wani nau'i ne na tsire-tsire masu furanni a cikin dangin dogbane, Apocynaceae, waɗanda suke da asali a Afirka. Tsire-tsire a cikin wannan nau'in an san su da abubuwan guba kuma ana amfani da su a maganin gargajiya don magance cututtukan zuciya. Saboda haka, kalmar "Genus Sttrophanthus" tana nufin rarrabuwa taxonomic na rukunin nau'ikan tsire-tsire a cikin halittar Sttrophanthus.