未草（ヒツジグサ） small white water-lily

　ヒツジグサと聞けば、動物の羊をイメージしますが、古時刻の未（ひつじ）時に咲くのが名前の由来です。

　Small white water-lily is "hituji-gusa" in Japanese.

　When I hear the "hituji-gusa" I think of sheep because of "hituji" means sheep and "gusa" means grass in Japanese. But in the old days, "sheep" has another meaning  "from 1 p.m. to 3 p.m.", so the name of grass comes from the old name of time.