Essays contributed as a tribute to T. G. Tutin. "Publications of T. G. Tutin": p. xv-xviii. Includes bibliographies and index.; 1. Valentine, D. H. Ecological criteria in plant taxonomy.--2. Smith, P. M. Chemical evidence in plant taxonomy.--3. Moore, D. M. The chromosomes and plant taxonomy.--4. Stace, C. A. Breeding systems, variation patterns and species delimitation.--5. Sneath, P. H. A. and Chater, A. O. Information content of keys for identification.--6. Parker, P. F. The classification of crop plants.--7. Hawkes, J. G. The taxonomist's role in the conservation of genetic diversity.--8. Yeo, P. F. Euphrasia.--9. Cook, C. D. K. The Hippuris syndrome.--10. Richards, P. W. The taxonomy of bryophytes.--ll. Hawksworth, D. L. The taxonomy of lichen-forming fungi.--12. Richardson, I. B. K. Endemic taxa and the taxonomist.--13. Walters, S. M. British endemics.--14. Heywood, V. H. European floristics.