also: くさねむ
Indian jointvetch
A plant species, Aeschynomene indica. Botanical term; learners may encounter it in nature guides or agricultural contexts.
Indian jointvetch often grows on the ridges of rice paddies.
Hiragana spelling, also common.
Kanji form is rare; the plant is almost always written in kana.
The name likely derives from 草 (kusa, 'grass') and 合歓 (nemu, from 合歓木 nemunoki, 'silk tree'), referring to its resemblance to the silk tree's leaves. The exact derivation is uncertain.