Kalmar "rayless chamomile" tana nufin wani nau'in tsiron fure a cikin dangin Asteraceae, wanda kuma aka sani da sunan kimiyya, Matricaria discoidea. Ana kiran wannan shuka "rayless" saboda kawunan furanninta ba su da sifofin raye-rayen ray waɗanda galibi ke kasancewa a cikin sauran membobin dangin daisy. Ana amfani da kalmar "chamomile" sau da yawa don kwatanta tsire-tsire masu kamshi, furanni masu kama da daisy waɗanda aka fi amfani da su a cikin shayi na ganye da magungunan halitta. Rayless chamomile ƙaramin tsiro ne na shekara-shekara wanda asalinsa ne a Arewacin Amurka kuma a wasu lokuta ana amfani dashi a cikin maganin gargajiya don magance cututtuka daban-daban.