1962’s Hugo-winning Hothouse is a standalone SF novel by Brian Aldiss.
In a distant future, the Earth is tide-locked to the Sun, while the Moon has retreated to one of the Earth-Sun Lagrange points. On the illuminated side of Earth, a vast banyan tree dominates the land. In this overheated world, voracious plants dominate. Only four groups of insects still exist on the banyan-dominated land: wasps, bees, ants and termites. All other animals are extinct.
All, save for the stunted, degenerate descendants of humanity.