Kalmar "genus" tana nufin rabe-raben haraji a cikin ilmin halitta wanda ke haɗa nau'ikan da ke da alaƙa. Halin halittar Bougainvillea rukuni ne na tsire-tsire masu furanni daga Kudancin Amurka, wanda ya haɗa da kusan nau'ikan nau'ikan 18. Tsire-tsire na Bougainvillea suna da haske, furanni masu ban sha'awa waɗanda ke kewaye da ƙananan furanni masu kama da ƙima. Ana shuka waɗannan tsire-tsire a matsayin tsire-tsire na ado a cikin yanayi mai dumi, yanayin rana a duniya.