Amplectosporangium—A New Genus of Plant from the Lower Devonian of Sichuan, China The Morphology and Systematic Position of Uncatoella verticillata Gumuia gyzzata A New Plant from the Lower Devonian of Yunnan, China A New Lower Devonian Genus from Yunnan, with Notes on the Origgin of Leaf Huia Recurvata --- A New Plant from Lower Devonian of Southeastern Yunnan China,