In his extraordinary book, Mayr fully explored, synthesized, and evaluated man's knowledge about the nature of animal species and the part they play in the proc

The first new, botanically detailed survey of irises to be published for over 80 years.

Predictions about where different species are, where they are not, and how they move across a landscape or respond to human activities -- if timber is harvested

This is the first text to focus on the comparative value of species, examining the relative consequences of individual extinctions. It attempts to provide ecolo

In this provocative work, David N. Stamos tackles the problem of determining exactly what a biological species is: in short, whether species are real and the na