MU COR ALES 



255 



The genus was based on the single species, D. fulva Schroter, 

 found on PaxiUus in Baden. Another collected by Thaxter 



Fig. 90.- — (a, h) Thamnidium simplex Brefeld, showing terminal sporangium 

 and lateral sporangiola. (c, d) Th. fresenii Schroter, showing terminal sporan- 

 gium, sporangiola, and sterile spines, (e) Th. elegans Link showing sporangiola. 

 {After Brefeld 1881, 1891.) 



on Boletus in Maine is discussed by Blakeslee (1904: 300) but is 

 not named. The genus is of unusual interest on account of the 

 dimorphism of spores in the two sorts of sporangia. 



