Notes For Reference:-　

Species, Varieties, or Forms in the Genus Parnassia:

Parnassia foliosa var. nummularia / Shirahigesou
Parnassia palustris var. multiseta / Umebachisou
　

Parnassia foliosa var. nummularia / Shirahigesou シラヒゲソウ

Parnassia foliosa var. nummularia is a perennial herb that is 10-30cm tall and inhabits wetlands in mountain valleys. Its radical leaves with long petioles, 2-4cm in length and width, are heart-shaped, while the other leaves on a stem, lacking petioles, embrace the stem. A single 2-2cm across flower appears on a shoot apex in August-September, with the margins of the five white petals splitting into threads. Bloom time: August-September.