Fig. 6From: A new Bergeria (Flemingitaceae) from the Mississippian of Xinjiang, NW China and its evolutionary implicationsEvolution of the shape of leaf cushions in Cathaysian lepidodendroid plants. a Differences in components of shapes of leaf cushions since the Mississippian to the Lopingian; b Ranges of the shapes of leaf cushions since the Mississippian to the LopingianBack to article page