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Cover Illustration: Cluster of submerged buds from the water lily Brasenia schreberi at various stages of development surrounded by substantial mucilage. In the first comprehensive investigation of pollen ontogeny in Brasenia, new anatomical and ultrastructural data are used to assess the evolution of pollen characters and pollination biology among water lilies and basal angiosperms. See Taylor and Osborn: Pollen ontogeny in Brasenia (Cabombaceae, Nymphaeales), pp. 344-356, in this issue. Photo credit: Jeffrey M. Osborn and Mackenzie L. Taylor; cover design by Winston Vanderhoof.