Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. GENERAL LAWS OF ANIMAL STRUCTURE. 245 acacias is not homologically a leaf at all, but a leaf- stem,
File:Acacia koa with phyllode between the branch and the compound leaves.JPG - Wikipedia
Developing phyllode Acacia melanoxylon | Many Australian wat… | Flickr