2iS INTRODUCTION TO THE STUDY OF FUNGI 



the subgenus DUlymdla uniseptate, and in Metasphaeria 

 multiseptate. The small genus Ophiobolus corresponds to the 

 genus Rcq^hidospora in the Caulicolae, in which the sporidia 

 are filitbrni. Of genera with coloured sporidia Anthostoma 

 includes those which are continuous ; and Didymosphaeria 

 those in which the sporidia are uniseptate. Leptosphaeria has 

 the sporidia multiseptate, but the coloration is often very- 

 slight. Other species of Lcptosphacria which grow on 

 herbaceous plants will be found under Heptameria in the 

 Caulicolae ; in fact, the separation of the two families Ohtcdac 

 and Caulicolae is a purely arbitrary one. Delacourea, again, 

 includes such species of Plcospora as are found growing on the 

 twigs of trees and shrubs, having coloured muriform sporidia. 



The fifteenth subfamily, Caulicolae, includes such species as 

 conform in habit to OUectae but are found on the dead stems 

 of herbaceous plants. In the genus Phomatospora the sporidia 

 are continuous and hyaline, hence corresponding to Physalo- 

 spora. In Apiospora the rather unusual form of sporidia is 

 found in which, though practically uniseptate, the lower cell is 

 small, consequent on the septum being placed near the base. 

 In Diclymella the sporidia are uniseptate and hyaline, and 

 correspond to the subgenus Didymclla of Endoplilaea. Mcta- 

 sphaeria is a large and important genus of Caulicolae, in which 

 the sporidia are multiseptate and hyaline. Raphidospora in- 

 cludes such caulicolous species as possess very long thread-like 

 sporidia, which may or may not be divided by transverse 

 septa into short joints. Of species which have coloured 

 sporidia those in which the sporidia are continuous will be 

 found in the genus Anthostomella, those with the sporidia 

 uniseptate in Didymosphacrella, and with the sporidia multi- 

 septate in Heptameria, corresponding to Lrptosphaeria. This 

 is one of the largest genera on herbaceous plants. Pleospora 

 is a well-known genus in which the perithecia are often 

 large, and become erumpeut. The sporidia are muriform and 

 coloured. Some species or other may be anticipated on the 

 dead stem of almost any herbaceous plant. The genus Pyreno- 

 p)liora differs from Pleosjjora in the perithecia being selulose, 

 but the sporidia the same (Fig. 102). 



The sixteenth subftimily is the Foliicolac, which, as the 



