Kalmar "ragwort ta zinare" tana nufin wani nau'in tsire-tsire na shekara-shekara, wanda aka fi samu a Arewacin Amirka, wanda ke cikin jinsin Packera (wanda aka sani da Senecio). Ana kuma san shi da sunan kimiyya Packera aurea.Tsarin yana siffanta shi da launin rawaya mai haske, furanni masu kama da daisy waɗanda ke fitowa cikin gungu a saman tsayi mai tsayi. Yawanci yana tsiro ne a cikin ciyayi masu ɗanɗano, tare da bankunan rafi, da kuma a wasu wuraren zama masu dausayi.A wasu yankuna, ana ɗaukar ragwort na zinari a matsayin ciyawa, amma kuma ana ƙimanta shi don kayan magani. An yi amfani da shi a al'ada don magance cututtuka iri-iri, ciki har da cututtuka na numfashi, matsalolin narkewa, da yanayin fata. Duk da haka, ya kamata a lura cewa cinye kowace shuka don dalilai na magani ya kamata a yi taka tsantsan tare da jagorancin ƙwararren likita.