Also I found many buds of Ooubayuri. Ooubayuri in kanji characters are 大姥(oouba)百合(yuri). 大姥 means "old woman" and 百合 is translated in English as lily. When they are in bloom, they lose leaves and a leaf in Japanese is a homonym of a tooth. The plants lose all their leaves(=teeth) when they are in bloom, hence they were named as mentioned.
Ooubayuri needs more than ten years to have flowers and after they bloom, they die out.
You can enlarge all the pictures.