FIGURE 22. A–F in Spore morphology of Selaginella (Selaginellaceae) from China and its systematic significance

FIGURE 22. A–F. Spore morphology of Selaginella bisulcata (A–D. Megaspores, E–F. Microspores). G–L. S. pennata (G–J. Megaspores, K–L. Microspores).—A, F, G, K. Proximal surfaces.—C, E, J, L. Distal surfaces.—B, D, H, I. Portions of surfaces enlarged to show infrastructural detail (B, H, I. Proximal surfaces; D. Distal surface). Scale bars = 100 µm (A, C, G & J); 50 µm (B, H), 20 µm (E, F, K & L), 10 µm (D, I).