364 THE MICROSCOPIST. 



masses, then into unappendaged spores ; few or no fila- 

 ments persistent. 



1. Ustilago. Spores simple. 



2. Thecaphora. Spores compound. 



II. Tilletiei. Stroma of interwoven fragile filaments ; 

 spores acrogenous on their ramules, often appendaged 

 when free. 



3. Tilletia. 



Order HYPHOMYCETES. Mycelium filamentous, 

 growing as moulds over dead or living organic substances. 

 The erect filaments bear terminal, free, single, simple, or 

 septate spores. 



Family I. ISARIACEI. Receptacle clavately branched, 

 of filaments attached in their whole length. Spores sim- 

 ple, attached to simple pedicels. 



Gen. 1. Isaria. Receptacle of interwoven filaments, 

 or cellularly fleshy. Spores on simple sporophores arising 

 on all sides. 



2. Anthina. Receptacle of parallel filaments, feathery 

 or villous at the summit where they form the sporo- 

 phores. 



8. Ceratium. Receptacle horn-shaped, mucilaginous, 

 with filaments which collapse into granules (conidia), and 

 free sporidia. 



Family II. STILBACEI. Receptacle wartlike or clavate 

 above, stalked below, of filaments packed, coherent, ter- 

 minating singly in free spores. 



Gen. 1. Stilbum. Receptacle clavate or capitate at sum- 

 mit. Spores simple. 



2. Pachnocybe. Receptacle stipitate, clavate, floccose, 

 filaments twisted, head finally pruinose, with simple 

 spores. 



3. Periconia. Receptacle of coalescent crowded, paral- 



