Notes For Reference:-

Species, Varieties, or Forms in the Genus Asarum:

Asarum asperum / Miyakoaoi
Asarum caurescens / Futabaaoi
Asarum_caulescens_f. / Shirobanafutabaaoi
Asarum dimidiatum / Kurofunesaishin
Asarum fauriei var. takaoi / Himekan'aoi
Asarum maruyamae / Izumosaishin
 

Asarum caurescens / Futabaaoi フタバアオイ

Asarum caurescens is a petal-lacking perennial that inhabits forests in mountainous regions. Stems grow crawling on the ground to set a pair of opposite leaves at the terminal. The leaves are oval, heart-shaped, 4-8cm long, with short white hairs on both sides. This species produces single, purple-brown, 1.5 cm in diameter flowers at the bases; the sepals bend backward outside at the halfway point to adhere to their lower portions. Bloom time: March-May.