Nanocnide japonica

Nanocnide japonica is a herbaceous perennial in the Urticaceae family, described by Blume in 1856. It is distributed across Japan, Korea, and parts of China. The plant grows in forest edges and gaps, with historical records indicating it was common near villages about a century ago, but it is now rare in such locations. The stems are glabrous or have appressed hairs, and the leaves are petiolate, with flabellate or deltate blades up to 4.5 cm long. The leaves have stinging hairs on the upper surface, and the plant produces separate male and female flowers. Staminate inflorescences are umbel-like, with male flowers having five stamens and a closed perianth that opens when mature. The pistillate inflorescences are solitary umbels. The species was validated through a single description for both the genus and species, as permitted by the International Code of Nomenclature for algae, fungi, and plants.