Explanation of Plate 20 



I. Helotium citrixum (Hedw.) Fries. 



a. Group of plants to show habitat natural size. 



b. Plants enlarged X -i. 



e. Ascus and paraphyses X 1500. 



d. Spore X 2000. 



II. Geopyxis kebulosa (Cooke) Sacc. 



a. Group of plants to show habitat natural size. 



b. One plant X 3. 



e. A?cus and paraphyses X 500. 

 d. Spores \ suo. 



170 



