He (1867-1914) was a Swiss Botanist who worked at the Amazon from 1895 to 1914 and authored a major work on taxonomy, phytogeography, plant ecology and agronomy.

This website provides open access to the publications of the Max Planck Research Library for the History and Development of Knowledge

Wallace Online is the first complete edition of the writings of naturalist and co-founder of the theory of evolution Alfred Russel Wallace