hitoegusa (Monostroma nitidum)
A species of edible green algae, often used in Japanese cuisine, especially in soups and as aonori.
Hitoegusa is often used as an ingredient in miso soup.
Usually written in katakana as a biological name; usually written in kana.
Kanji form; rarely used in practice.
The name literally means 'single-layered grass', referring to its thin, single-cell-layer structure.