Fig. 8. 
Explanation of Figures. 
Fig. 1. A mature plant. Fig. 2. Section of young plant. Fig. 3. A 
plant with scurfy particles of exoperidium. Fig. 4. A plant with exoperidium. 
Fig. 5. An unusually large plant, from C. V. Piper, Washington. Fig. 6. Capil- 
litium (x 80). Fig. 7. Spores (x 1000). Fig. 8. Spores of oval-spored form 
(x 1000). 
BOVISTA PLUMBEA. 
