節分草

Literally, “Setsubun grass”, 節分(せつぶん) (setsubun, “Setsubun, the first day of spring”) + 草(そう) (sō, “grass, plant”)

• IPA^(key): [se̞t͡sɨbɯ̟̃ɰ̃so̞ː]

節(せつ)分(ぶん)草(そう) or 節分草(セツブンソウ) • (setsubunsō) 

1. Eranthis pinnatifida, a species of winter aconite

   Synonym: 家楡 (ienire)

As with many terms that name organisms, this term is often spelled in katakana, especially in biological contexts (where katakana is customary).