Notes For Reference:-　

Species, Varieties, or Forms in the Genus Menyanthes:

Menyanthes trifoliata / Mitsugashiwa
　

Menyanthes trifoliata / Mitsugashiwa ミツガシワ

Spreading rhizomes sideways, Menyanthes trifoliata, an aquatic perennial herb, inhabits marshes or swamps in mountainous regions. With long petioles, leaves are three leaflets, each 4-8cm long. Stem tops form racemes, approximately 30cm in height, and produce 10-20 white flowers, each about 1 cm across, in them; they bloom sequentially from bottom to top. Corollas are deeply cleft into 5, and each segment has many twisted white hairs inside. Sepals 5 in number, stamens 5, and pistils 1. Bloom time: May-August.