In Shimane, Sagittata trifolia grows wild in the wet places like a
marsh, shallow pond, paddy, damp ditch, etc., with the long-lobed,
arrow-head shaped leaves straight upward, getting out of water.
Flowers, with three vivid petals, are borne in the whorl of three
around the stalk, the upper portion of which sets male flowers, and
the lower portion male flowers.