This colored part of the eye shares its name with a type of flower
The 
female part of a flower is called a Pistil, or Carpel, which consists of the Stigma, 
Style,... [DOC] [TLE] What flower shares its name with a part of the eye ball ... [PAR] An Iris is a flower as well as part of the eye (it is the coloured ring around your 
pupil).