FIGURE 29. A–E in Spore morphology of Selaginella (Selaginellaceae) from China and its systematic significance

FIGURE 29. A–E. Spore morphology of Selaginella commutata (A–C. Megaspores, D–E. Microspores). F–L. S. frondosa (F–J. Megaspores, K–L. Microspores).—A, D, F, H, K. Proximal surfaces.—C, E, G, I. Distal surface.—L. Tetrad.—B, J. Portions of proximal surface enlarged to show infrastructural detail. Scale bars = 100 µm (A, C, F, G, H & I), 50 µm (B, J); 20 µm (D, E, K, L).