274 INTRODUCTION TO THE STUDY OF FUNGI 



cristate, and therefore analogous to Bolillarda but with con- 

 tinuous sporules, or a dwarfed form of Pestalozzia without 

 colour and without divisions. The next section is a modified 

 one, or at least the Scoleco-aUantosporae combines Scolecosporae 

 and Allantosporae in a single section. In one genus, that of 

 Cylindrosporium, the sporules are really filiform ; in Crypto- 

 sporium and Libertella elongated and falcate, but scarcely fili- 

 form ; and in Nemaspora they are allantoid, or sausage-shaped. 

 In Cylindrosporium the species are parasitic on living leaves, 

 and thus correspond to Gloeosporium. In the other three 

 genera they are saprophytic, chiefly affecting the bark of dead 

 branches. In Cryptosporium the sporules are mostly rather 

 large and robust, but in Libertella slender, oozing out in 

 brightly coloured tendrils. Nemaspora somewhat resembles 

 Lihertella, but the sporules are shorter, and allantoid. In all 

 three genera there are many species which are regarded as 

 stylosporous forms of ascigerous Fungi, and suggest analogy to 

 Cytospora in the Sphaeropsoideae. 



The section Phaeosporae is the most typical, and includes 

 the genus Melanconium, which is almost the same as Fries left 

 it, with subglobose or oblong dark -coloured sporules, often 

 oozing out and blackening the orifice of the pustules. Some 

 of the species are associated with Sphaeriaceae of the genus 

 Melanconis, but others may prove to be autonomous. Crypto- 

 mela is analogous to Cryptospoi'ium, but with coloured sporules. 

 Thyrsidium is, however, a genus by itself, in which the con- 

 tents of the pustules are gelatinous, and the sporules are 

 minute, but clustered in chains at the apex of elongated 

 sporophores, in a capitate manner, involved in a mucous 

 envelope. 



The Didymosporae include four genera, in which the 

 sporules are uniseptate, and in two of them coloured, whilst in 

 other two they are hyaline. Of the former, Didymosporium 

 corresponds to Melanconium, but with two-celled sporules ; and 

 Bullaria, with a single species, has the conidia connected in 

 chains by a narrow hyaline isthmus. Of the two genera with 

 hyaline sporules, it has already been intimated that Marsonia 

 is the analogue of Gloeosporium, with the same habit and the 

 same parasitic character, but the sporules are septate. Se2)to- 



