LES, D. H., GAVIN, D. K., WIMPEE, C. F., 1991: Molecular evolutionary history of ancient aquatic angiosperms. - Proc .. Natl. Acad. Sci. USA 88: 10119-10123. LLOYD, D. G., WELLS, M. S., 1992: Reproductive biology of a primitive angiosperm. Pseudowintera colorata (Winteraceae), and the evolution of pollination systems in the Anthophyta. - PI. Syst. Evol. 181: 77-95. PELLMYR, 0.,1992: Evolution of insect pollination and angiosperm diversification. - Trends Ecol. Evol. 7: 46-49. QIU, Y.-L., CHASE, M. W., LES, D. H., PARKS, C. R., 1993: Molecular phylogenetics of the M agnoliidae: cladistic analyses of nucleotide sequences of the plastid gene rbcL. - Ann. Missouri Bot. Gard. 80: 587-606. TAYLOR, D. W., HICKEY, L. J., 1990: An Aptian plant with attached leaves and flowers: implications for angiosperm origin. - Science 247: 702-704. - - 1992: Phylogenetic evidence for the herbaceous origin of angiosperms. - PI. Syst. Evol. 180: 137-156. THIEN, L. B., BERNHARDT, P., GIBBS, G. W., PELLMYR, 0., BERGSTROM, G., GROTH, I., MCPHERSON, G., 1985: The pollination of Zygogynum (Winteraceae) by a moth, Sabatinca (Micropterigidae): an ancient association? - Science 227: 540-543. TOMLINSON, P. B., 1991: Pollen scavenging. - Natl. Geogr. Res. Explor. 7: 188-195. TUCKER, S. c., 1984: Origin of symmetry in flowers. - In WHITE, R. A., DICKISON, W. c., (Eds): Contemporary problems in plant anatomy, pp. 351-395. - Orlando: Academic Press.