Kalmar "Nelumbo lutea" tana nufin wani nau'in tsire-tsire na ruwa wanda aka fi sani da magarya na Amurka ko rawaya. Memba ne na dangin Nelumbonaceae kuma asalinsa ne zuwa Arewacin Amurka, gami da yankuna gabas da tsakiyar Amurka. Itacen yana da manyan ganye masu zagaye kuma yana fitar da furanni masu launin rawaya na musamman waɗanda suke fure daga Yuni zuwa Satumba. Ana kuma daraja magarya mai launin rawaya don iri da ake ci da rhizomes, waɗanda aka yi amfani da su wajen maganin gargajiya da abinci.