Kalmar "Order Equisetales" tana nufin rukuni na tsire-tsire a cikin aji Equisetopsida (wanda aka fi sani da Sphenopsida) waɗanda aka fi sani da doki ko ƙwanƙwasa. Waɗannan tsire-tsire suna da alaƙa da haɗin gwiwa, mai tushe mai tushe tare da ƙananan sikeli-kamar ganyaye a kumburi, kuma suna haifuwa ta spores. Tsarin Equisetales ya ƙunshi nau'in halitta guda ɗaya kawai, Equisetum, wanda ya haɗa da kusan nau'ikan 20. Ƙungiyar ta kuma haɗa da ɓangarorin da dama waɗanda suka bambanta sosai a baya, a lokacin Carboniferous da Permian.