Systematic and Evolutionary Studies in the Plant Family Onagraceae

密苏里州植物园的瑞文和霍克博士 继续他们的多学科，多研究者的研究， 夜来香报春花科植物，柳叶菜科，一组 16个属和CA。全球650种 这些目标 完成所有属和所有的彻底的分类评价 物种，并使用全面的形态，染色体， 以及多年来产生的生化信息， 在一个介质中的进化模式和过程的综合 开花植物的一个大科。 这项更新补助金的具体目标是完成 柳叶菜属（杂草）和路德维希属的分类修订， 最大和最困难的属;分类学的准备 几个植物区系目录的科的处理 包括几个热带美洲;和确定 属和种之间的系统发育关系，使用 各种形态学，染色体， 生化数据集 系统发育分析结果比较 对不同数据集的分析将提供独特的见解， 不同植物特征的进化速度差异， 将决定染色体变化的相对重要性 物种形成和繁殖系统的组织和变化， 地理分布

Drs. Raven and Hoch of the Missouri Botanical Garden will continue their multi-disciplinary, multi-investigator study of the evening primrose family of plants, the Onagraceae, a group of 16 genera and ca. 650 species worldwide. The goals are to complete thorough taxonomic evaluations of all genera and all species, and to use the comprehensive morphological, chromosomal, and biochemical information produced over the years to generate a synthesis of the evolutionary patterns and processes in a medium sized family of flowering plants. Specific goals of this renewal grant are completion of taxonomic revisions of Epilobium (fireweeds) and Ludwigia, two of the largest and most difficult genera; preparation of taxonomic treatments of the family for several floristic inventories including several for tropical America; and determination of phylogenetic relationships among the genera and species, using cladistic analyses of various morphological, chromosomal, and biochemical datasets. Comparison of results from phylogenetic analyses on different datasets will provide unique insights into differences in rates of evolution in various plant features and will determine the relative importance of change in chromosome organization and change in breeding system in speciation and geographic dispersal.