装そう飾しょく花か

noun

ornamental flower; decorative sterile floret

Botanical term. Refers to a flower or floret that is showy but often sterile, such as the ray florets of a composite flower (e.g., sunflower).

• ヒマワリの装そう飾しょく花かは、虫むしを引ひき寄よせる役やく割わりがある。

  The ornamental flowers of a sunflower serve to attract insects.