Paul Wilkin is Lilioid and Alismatid Monocots and Ferns Team Leader in the Herbarium, Library, Art and Archives Directorate of the Royal Botanic Gardens, Kew. His main research foci are systematics of Dioscoreales (yams and their allies) and Dracaenoids (dragon trees and mother-in-law's tongues), lilioid monocots widely used in human diet and horticulture, with taxa of high conservation and ecological importance. He is principal investigator of the eMonocot biodiversity informatics project. Simon J. Mayo is an Honorary Research Associate at the Royal Botanic Gardens, Kew. Since 1977 he has worked on the systematics and phylogeny of the Araceae, the largest plant family of the early divergent clades in monocots. He has been active in postgraduate teaching in Brazilian universities since 1988, focussing on monocot families and especially the Araceae.

• List of contributors; Preface; 1. A well-supported phylogenetic framework for the monocot order Alismatales reveals multiple losses of the plastid NADH dehydrogenase complex and a strong long-branch effect W. J. D. Iles, S. Y. Smith and S. W. Graham; 2. The fossil record of non-commelinid monocots S. Y. Smith; 3. Is syncarpy an ancestral condition in monocots and core eudicots? D. D. Sokoloff, M. V. Remizowa and P. J. Rudall; 4. Diversification of pollen and tapetum in early-divergent monocots C. A. Furness; 5. Macroecological correlates of global monocot species richness F. A. Jones, B. Sobkowiak, C. D. L. Orme, R. Govaerts and V. Savolainen; 6. In time and with water... the systematics of alismatid monocotyledons D. H. Les and N. P. Tippery; 7. Evolution of floral traits in relation to pollination mechanisms in Hydrocharitaceae N. Tanaka, K. Uehara and J. Murata; 8. Patterns of bract reduction in racemose inflorescences of early-divergent monocots M. V. Remizowa, D. D. Sokoloff and P. J. Rudall; 9. Recent progress in the phylogenetics and classification of the Araceae S. J. Mayo, J. Bogner and N. Cusimano; 10. The first evolutionary classification of the Araceae: A. Engler's natural system S. J. Mayo and J. Bogner; 11. Aroid floral morphogenesis in relation to phylogeny D. Barabé; 12. Some observations on the homology of the daffodil corona R. W. Scotland; 13. Anther, ovule and embryological characters in Velloziaceae in relation to the systematics of Pandanales M. G. Sajo, R. Mello-Silva and P. J. Rudall; 14. Contrasting patterns of support among plastid genes and genomes for major clades of the Monocotyledons J. I. Davis, J. R. McNeal, C. F. Barrett, M. W. Chase, J. I. Cohen, M. R. Duvall, T. J. Givnish, S. W. Graham, G. Petersen, J. C. Pires, O. Seberg, D. W. M. Stevenson and J. Leebens-Mack; Index.