Stemonitae. 7 1 



ANALYSIS OF THE GENERA. 



Sub-sect. STEMONITAE. 

 A. Sporangia free. 



STEMONITIS. Capillitium threads springing from all sides 

 of an elongated columella. 



B. Sporangia forming an aethalium. 



Siphoptychium. Sporangia straight, parallel, each containing 

 a central columella. 



AMAUEOCHAETE. A large, pulvinate aethalium, bifurcating 

 branches of capillitium connected for some distance by a thin 

 membrane. 



BREFELDIA. Aethalium large, threads of capillitium with 

 clusters of vesicular bodies. 



Eostafinskia. Threads of lower portion of capillitium septate. 



RETICULARIA. Aethalium pulvinate; capillitium threads 

 forming an irregular network without vesicles or flat mem- 

 branous expansions. 



Sub-sect. LAMPRODERMAE. 



ENERTHENEMA. Threads of capillitium springing from a 

 flattened disc at the apex of the columella. 



Ancyrophorus. Threads of capillitium springing from a 

 flattened disc at the apex of the columella, and also from the 

 columella throughout its length. 



LAMPRODERMA. Threads of capillitium springing from the 

 abrupt apex of the short columella. 



Echinostelium. Columella absent ; capillitium springing from 

 apex of stem. 



Raciborskia. Wall of sporangium absent, main branches of 

 capillitium springing from apex of a short columella, becoming 

 branched, branches forming a network. 



Orthotricha. Sporangial wall absent from the first. 



