Explanation of Plate 13 



I. Humaria tetraspora (Fuckel) Sacc. 



a. Several plants natural size. 



b. Three plants X 5. 



c. Ascus and paraphysis X 600. 

 (1. Diagram section X 10. 



e. One spore X 1500. 



II. Humaria mtjralis (Quel) Sace. 



a. Plants showing habitat natural size. 



b. Plants X 5. 



c. Ascus and paraphysis X 400. 



d. Diagram section X 10. 



e. One spore X 1000. 



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