1. Hutchinson, J., The Genera of Flowering Plants. Dicotyledones, 1 (Oxford, 1964).
2. Weberling, F., Flora, 143, 201 (1956); ibid., 149, 189. Weberling's information is incorporated in Engler's Syllabus der Pflänzenfamilien, 2—Ed. 12 (Berlin, 1964).
3. Carr, D. J., and Carr, S. G. M., in The Evolution of Living Organisms, edit. by Leeper, G. W., chap. 35 (Melbourne, 1962).
4. Blakely, W. F., A Key to the Eucalypts, second ed. (Canberra, 1955).
5. Carr, S. G. M., and Carr, D. J., Proc. Roy. Soc. Vic., 77, 207.