Kalmar "Slender spike rush" tana nufin wani nau'in shuka na dangin Cyperaceae, jinsin Eleocharis. Tsire-tsire ne na shekara-shekara wanda yawanci ke tsiro a wuraren dausayi kamar su marshes, bogus, da gefen tabkuna da koguna. Ita wannan tsiron tana da siriri da ganyayenta masu kama da ciyayi, waɗanda suke fitowa daga wani tushe na tsakiya, da ƙananan furanni masu kama da karu waɗanda aka jera su cikin gungu a saman gindin. Ana amfani da shukar sau da yawa a cikin ayyukan gyaran ƙasa da kuma matsayin shuka na ado a cikin lambunan ruwa.