Kalmar "Dipsacus sylvestris" tana nufin wani nau'in tsire-tsire na fure a cikin dangin Caprifoliaceae, wanda aka fi sani da teasel na daji ko mai cikawa. Tsiron ya fito ne daga Turai da Asiya kuma ana siffanta shi da dogayen sa, masu kauri da kawuna masu siffar mazugi. An dade ana amfani da busasshiyar kanun furannin shukar a cikin masana'antar masaku don tada barci a kan yadudduka na ulun, kuma ana amfani da shukar don magani a cikin magungunan gargajiya na gargajiya.