Gentianella amarella wani nau'in tsire-tsire ne na fure a cikin dangin Gentianaceae, wanda kuma aka sani da sunayen gama gari na dwarf gentian kaka, felwort ko bitterwort. Karamin tsire-tsire ne na shekara-shekara ko na shekara-shekara, ɗan asalin Turai da Asiya. Itacen yana samar da furanni masu launin shuɗi ko violet-blue waɗanda galibi masu siffar mazurari ne, kuma ana yawan amfani da ita wajen maganin ganye saboda ɗanɗanonsa da kuma fa'idodin kiwon lafiya da ake ɗauka.