FIGURE 34. A–F in Spore morphology of Selaginella (Selaginellaceae) from China and its systematic significance

FIGURE 34. A–F. Spore morphology of Selaginella involvens (A–D. Megaspores, E–F. Microspores). G–L. S. leptophylla (G–J. Megaspores. K–L. Microspores).—A, E, G, K. Proximal surfaces.—C, I, L. Distal surfaces.—H. Lateral surface.—F. Tetrad.—B, D, J. Portions of surfaces enlarged to show infrastructural detail (B. Proximal surface; D, J. Distal surfaces). Scale bars = 100 µm (A, C, G, H & I), 50 µm (B), 20 µm (E, F, K & L), 10 µm (D, J).