|Coptis japonica var. major
is a perennial inhabiting a moist forest floor that looks like a
place for a 'spring ephemeral,' such as Fritirallia ayakoana, Aneｍone
keisukeana, etc., in this part of the country. In this species,
there are three types from the point of view of sexuality; male,
female, and bisexual flower. The most numerous are the male flowers,
followed by the bisexual ones; the female is rare.