Heywood, V.H. (editor): Flowering Plants of the World, Prentice-Hall, New York, 1985. An outstanding guide to the families of flowering plants, with excellent illustrations and diagrams.

Hobson, G.: "How the Tomato Lost Its Taste," New Scientist, September 1988, vol. 119, pages 46–50. No one seems to know exactly when the flavor fled the tomato, only that it did. Scientists are searching for the lost ingredient.

Johnson, W.C. and C.S. Adkisson: "Airlifting the Oaks," Natural History, October 1986, pages 40–46. Bluejays spread acorns widely to new habitats; an example of animal dispersal of plant fruits and seeds.

Jones, S.B., Jr. and A.E. Luchsinger: Plant Systematics, 2d. ed., McGraw-Hill, New York, 1986. A comprehensive account of plant systematics, including a useful review of plant families.

Proctor, M. and P. Yeo: The Pollination of Flowering Plants, Taplinger, New York, 1973. An excellent introduction to pollination biology, clearly and interestingly presented.

Richards, A.J.: Plant Breeding Systems, George Allen & Unwin, London, 1986. An excellent account of all aspects of the subject.