Arum cylindraceum.
They're right now beginning to flower, and flowering fully, and withering away already - all that at the same time.
Which is easy to explain: they have a fly-catcher flower, flies are trapped inside that flower until they have pollinated them; when they have the flower will wilt, and after a couple of days release the insect trapped in there. The last picture in this series is one of those which soon will release its pollinator.
It is a mean trick, isn't it? Those insects have to do work for which they are rewarded with nothing but a few days in prison.
