PHYSARACE.E. 



27 



KEY TO THE GENERA OF PHYSARACEJE. 



A. Capillitium a coarse network charged with lime throughout. 



(2) BADHAMIA. 



Fig. 10. Badhamla utricularis Berk. 



a. Cluster of sporangia. Magnified 3 times. 



b. Fragment of capillitium and spore-cluster. 



Magnified liO times. 



Fig. 10. 



B. Capillitium a delicate network of threads with vesicular ex- 

 pansions filled with lime-granules (= lime-knots). 

 A. Sporangia combined into a convolute sethaliurn. 



(4) FULIGO. 



Fig. 11. Fuliyo sept tea Gmel. 



a. JEthalium. One-third natural size. 



b. Capillitium threads with lime-knots and two 



spores. Magnified 120 times. 



Fig. 11. 



B. Sporangia single, scattered or aggregated. 



a. Sporangium- wall membranous, with innate lime- 

 granules either in clusters or compacted and chalky. 

 Sporangia subglobose or plasmodiocarps. 



(3) PHYSARUM. 



Fig. 12. Physarum nutans Pers. 



a. Two sporangia. Magnified 9 times. 



b. Capillitium threads, with lime-knots, attached to 



a fragment of the sporangium- wall. Magnified 

 110 times. 



Fig. 12. 



