CRYPTO GAMIC PLANTS. 



89 



In the great family of Fungi, many cases of 

 phosphorescence have been accurately observed, 

 especially among the Rhizom orpine, cnrious vege- 

 table organisms, resembling long thin dark-co- 



loured roots (rliizo-morplia, in form of a root) , some- 

 times expanding into a membraniform production, 

 which are seen creeping between the bark and the 

 wood of old decayed trees (willows, oaks, poplars), 

 or shooting down into dark holes, into damp cre- 

 vices, etc. 



The white, flocconous extremities which consti- 

 tute the mycelium of the species known as R. siib- 

 terranea (fig. 10), observed not unfrequently at the 



