Notes For Reference:-　

Species, Varieties, or Forms in the Genus Laportea:

Laportea bulbifera / Mukagoirakusa
Laportea macrostachya / Miyamairakusa
　

Laportea macrostachya / Miyamairakusa ミヤマイラクサ

Laportea macrostachya, a perennial herb 40-80cm in height, occurs in damp places in mountainous and subalpine regions, characterized by spines on its stems and leaves that can cause injury. Leaves are of alternate phyllotaxis, with long petioles, broad oval blades, 6-15cm long, tips elongating in a tail-like manner, and coarse serrations on margins. Dioecious: Female flowers put themselves on long upper parts' spikes, with petaloid sepals and one style. Male flowers, white, attach to the axils below the female ones in a conical way. Bloom time: July-September..