Kalmar “genus” tana nufin nau’in harajin haraji da ke sama da nau’in jinsi da ƙasa da iyali, kuma “Gerardia” wani nau’in tsiro ne a cikin dangin Orobanchaceae, wanda ya ƙunshi nau’in tsiro na ganye kusan 75 waɗanda galibinsu ‘yan asalin Arewacin Amurka ne. . Waɗannan tsire-tsire ana siffanta su da furannin tubular, waɗanda yawanci rawaya, lemu, ko launin ja.
