Explanation of Plate XXIII. 



Mollisia dehnii (Rabenh.) R'arst. 



Fig. I, a. Plants showing habitat, natural size. 



Fig. I, b. Several plants, x 3. 



Fig. I, c. Ascus and paraphyses, x 1000. 



Fig. I, d. One spore, x 2500. 



MOI.WSIA polygoni (Lasc/i.) Gill. 



Fig. ii, a. Plants showing habitat, natural size. 



Fig. ii, b. Several plants, x 5. 



Fig. ii, c. Ascus and paraphysis, x 1200. 



Fig. ii, d. Two spores, x 2300. 



