FIGURE 19. Riella echinata. A-B. General habit. A. Female plant. B. Male plant. C. Vegetative scales. D. Gemmaling. E in Taxonomic revision of Riella subgenus Trabutiella (Riellaceae, Sphaerocarpales)

FIGURE 19. Riella echinata. A-B. General habit. A. Female plant. B. Male plant. C. Vegetative scales. D. Gemmaling. E. Detail of cells from margin of thallus wing. F. Female involucre. G. Transverse section of female involucre. H. Spore in distal view. I. Spines from distal face. (A–G from 9.232 VAL-Briof., H from 04003558 JE, I from 006621 Herb. Dirkse).