Isto é Hothouse por Brian Aldiss, publicado em 1962.
Brian Aldiss descreve o assunto :
The true successor to Non-Stop, it appeared originally as a series of short stories in The Magazine of Fantasy & Science Fiction. It tells the story of how Gren and Yattmur lived to see the near-end of Earth, when the sun is going nova and Earth presents one face to it. Gren and the parasitic morel travel from brilliance into twilight. The terrors are relieved by the comedy of the tummy belly men.