Physiological Plant Anatomy (original German title: Physiologische Pflanzenanatomie) is a botany book first published in 1884 by Gottlieb Haberlandt (1854–1945). The textbook focuses on the investigation of each plant tissue layer and the final analysis of their physiological performance regarding the previous. With this book Haberlandt used a new viewpoint and motivation into combining different fields of science. He created an informative overview and a way of classifying plant tissues based upon their function. Source: Wikipedia (en)