Notes For Reference:-

Species, Varieties, or Forms in the Genus Orostachys:

Orostachys japonica f. polycephala / Yatsugashira
Orostachys japonica / Tsumerenge
Orostachys malacophylla var. Iwarenge / Iwarenge

Orostachys malacophylla var. Iwarenge / Iwarenge イワレンゲ

Orostachys malacophylla var. Iwarenge is a perennial herb that grows on rocks, roofs of houses, and similar surfaces. The leaves are pruinose and flatter than those of another close species, Orostachys japonica, which are oblong in shape and 4-6cm long. Flowers are white-green, with tips not too sharp. Bloom time: September-November.