Among these species Conchophyllum richthofeniiand Lepidodendron galeatum may be taken as leading forms of this lassembageon account of their full development in the Penchi Formation,from whichthe Early Cathaysia flora(Stage A)in Eastern Asia is derived.

• Conchophyllum richthofenii Halle；Tingia sp.；由此认为华夏植物群从本溪期开始；并将 Lepidodendron galeatum-Conchophyllum richofeni 作为早期华夏植物群 A 期的植物组合