THE task of summarising the principles of ecology and other branches of botany concerned with the relation of plant to environment is one with which teachers are confronted at the present time.

Some plant species put out their seeds ... et al. 1998. "Integrative ecology and the dynamics of species in oak forests." Integrative Biology, 1: pp. 178-186. Schauber, E. M., ...

His famous illustration of Chimborazo volcano in Ecuador shows plant species living at different elevations. Public domain / Wikimedia Commons The German naturalist and explorer Alexander von ...