FIGURE 30. A–F in Spore morphology of Selaginella (Selaginellaceae) from China and its systematic significance

FIGURE 30. A–F. Spore morphology of Selaginella rolandi-principis (A–D. Megaspores, E–F. Microspores). G–L. S. superba (G–I. Megaspores, J–L. Microspores).—A, E, G, J. Proximal surfaces.—C, H, K. Distal surfaces.—I. Lateral surface.—F, L. Tetrads.—B, D. Portions of surfaces enlarged to show infrastructural detail (B. Proximal surface, D. Distal surface). Scale bars = 100 µm (A, C, G, H & I), 20 µm (E, F, J, K & L), 10 µm (B, D).