Species in the genus Juncus:

Juncus leschenaultii / Kougaizekishou コウガイゼキショウ

Juncus leschenaultii: A perennial occurring in wetlands or the water's edges, the stems are flat with narrow wings, growing to 20-40cm in height. Leaves are sword-like linear with tube-bundles texture insides and a 2-3mm width. The inflorescences spread apart in a cyme way, with many flower heads - each with 3-10 florets. Stamens are three capsules in the shape of an acute head and long trigonal pyramid, and the size is as long as perianth segments or a little more. Bloom time: June-July.