Fritirallia ayakoana inhabits the fringes of deciduous tree forests where the new green above covers up in mid-late spring. Appearing from underground in late February, F. ayakoana flowers in March and dies back (wither from the tips of branches to the roots, leaving roots behind) in late May. That is why people call it a spring ephemeral. This species is endemic to Shimane, and its Red Data Book lists it as a CR+EN. The flower (a set of sepals) is a cup-shaped campanulate with a striking nectary on each tepal, a few millimeters from the base, identifying this species. Bloom time: March-April.