(Ceropegia mossamedensis)
Schoenoplectus trapezoidus is a half-grass species first described by Gen-Iti Koidzumi,and now became known as Eisuke Hayasaka and Hiroyoshi Ohashi.Schoenoplectus trapezoidus is included in the genus flock,and the family half-grass.No subspecies are listed in the Catalog of Life