Fig. 28

28.1 The inward U-shaped folding of leaf blades of Scirpoides-b (sci-b.4). Bowman is to the right in B. 28.2 Revoluted leaf blade 1 (rvl1.a) rolled into a tube through a counterclockwise spiral. 28.3 A. Scirpoides leaf-b (scl-b.5) single culm with spike. B. Close-up of the base of a spike with curled upper basal rachis internode and typical rolled leaf blades