Centauria Cineraria shine ainihin sunan kimiyya na nau'in shuka wanda aka fi sani da miller mai ƙura ko ragwort na azurfa. Ita ce tsire-tsire na herbaceous na shekara-shekara daga yankin Bahar Rum amma an noma shi sosai a wasu sassan duniya a matsayin tsire-tsire na ado don kyawawan ganyen azurfa-launin toka. A cikin maganin gargajiya, an yi amfani da tsire-tsire don maganin kumburi da maganin arthritic. A cikin noman noma, ana yawan girma a matsayin shukar iyaka ko kuma a matsayin mai filler a gadajen gadaje masu gauraya.