Families and Genera U 



Family II. LICEACEAE. Sporangia solitary; sporangial 

 wall cartilaginous or membranous. 



Genus 29. Licea Schrad. 



30. Orcadella Wing. 



Family III. TUBULIN ACEAE. Sporangial wall membra- 

 nous, without plasmodic granules; sporangia clustered, cylindrical 

 or ellipsoid. 



Genus 31. Tubifera Gmel. 



32. Alwisia Berk. & Br. 



Family IV. RETICULARIACEAE. Sporangia closely com- 

 pacted and usually forming aethalia; sporangial walls incom- 

 plete, perforated, or forming a spurious capillitium; true capilli- 

 tium none, or in Liceopsis consisting of a few branching threads 

 or strands. 



Genus ZZ. Dictydiaethalium Rost. 



34. Enteridium Ehrenb. 



35. Reticularia Bull. 



36. Liceopsis Torrend 



Family V. LYCOGALACEAE. Sporangia forming aethalia ; 

 pseudo-capillitium consisting of branched colorless tubes. 



Genus 37. Lycogala Mich. 



Suborder II. CALONEMATINEAE. Capillitium present 

 as a system of uniform or sculptured threads. 



Family I. TRICHIACEAE. Capillitium consisting of tubu- 

 lar threads, which are either free and usually unbranched (elaters), 

 or form a network branching at wide angles, with thickenings in 

 the form of spirals. 



Genus 38. Trichia Haller 



39. Oligonema Rost. 



40. Calonema Morg. 



41. Hemitrichia Rost. 



Family II. ARCYRIACEAE. Capillitium a network of tub- 

 ular threads branching at wide angles, smooth or thickened with 

 cogs, half-rings, spines, or warts (capillitium often scanty and of 

 free threads in Perichaena corticalis). 



