The Natural Philosophy of Plant Form - Paperbackby Agnes Arber (Author) When she was elected a Fellow of the Royal Society in 1946, Agnes Arber (1879 1960) was one of only three women to have been admitted into the institution. Arber conducted research that focused mainly on the morphology of flowering plants, but her work is characterised by its explorations of historical botany and evolution. First published in 1950, this book widens the scope of morphology into a study of all aspects of form