Notes For Reference:-

Species, Varieties, or Forms in the Genus Eriocaulon:

Eriocaulon cinereum / Kurohoshikusa
Eriocaulon decemflorum / Itoinunohige
Eriocaulon miquelianum / Inunohige
Eriocaulon robustius / Hirohainunohige
Eriocaulon sieboldtianum / Hoshikusa
Eriocaulon taquetii / Nippon'inunohige

Eriocaulon robustius / Hirohainunohige ヒロハイヌノヒゲ

Eriocaulon robustius is an annual herb that occurs in wetlands. Leaves are many in clusters, 9-17cm long and 0.5-1cm wide, in the shape of a lanceolate leaf. Flower stalks, 5-ridged and somewhat twisted, grow to 5-20cm in height, with 4-7cm long sheaths at the bases. Flower heads measure 7-9mm in diameter, are semi-spherical in shape, and are light brown, with involucral bracts shorter than them. Male flowers' sepals and inside petals have hairs. Bloom time: September-October.