i8o 



INTRODUCTION TO THE STUDY OF FUNGI 



Some mycologists have advanced the opinion that at least 

 many of the species of the genus of moulds named Botrytis 

 are the conidia of some species of Peziza. 



It has been shown by Tulasne, and others, that some of 

 the discoid Fungi appear under two or more forms or phases, 



which resemble each 

 other in outward ap- 

 pearance, but differ 

 in fructification. In 

 the case of Calloria 

 fusarioides, on nettle 

 stems, there is a con- 

 idial form in which 

 no asci are developed, 

 but naked spores are 

 produced on sporo- 

 phores. Later on, 

 and upon the same 

 stems, in company 

 with the conidia true 

 cups are perfected 

 which contain asci 

 and sporidia. Both 

 are of the same size 

 and colour, and in 

 well-developed speci- 

 mens it is difficult 

 to distinguish them 

 without the use of 

 the microscope. In 

 the case of Coryne 

 sarcoides the same re- 

 semblance exists be- 

 tween the two con- 

 ditions. The form 

 in which conidia 

 only are produced was previously called Tremella sarcoides, 

 and is of a peculiar reddish -violet colour, bursting in 

 clusters through fissures in wood or bark. The perfect 



Fig. 1i. — Sderotinia tuberosa on anemone. 

 Gard. Chron. 



