Trichiaceae 223 



marked with dark, branching, superficial vesicles which form 

 spots or a broken reticulation, chiefly on the upper part; cortex 

 thin, of two closely combined layers; outer layer traversed by 

 flattened tubes 2-10 /x broad, these either loosely interlacing or 

 nearly parallel in a single series and separated by intervals of 

 2-20 m; tubes piercing the membranous inner layer and continu- 

 ous with the pseudo-capillitium, the latter consisting of simple, 

 rarely branching, olivaceous gray tubes 3 n diam., or varying from 

 2-7 fx, faintly and minutely wrinkled, with clavate or obtuse ends. 

 Spores yellowish gray or ochraceous, minutely reticulate over 

 the greater part of the surface, 4-5 ^i diam. 



Type locality: Germany. 



Habitat: On dead wood. 



Distribution: *Canal Zone, Florida, Indiana, *Missouri, 

 Ohio, Pennsylvania, Virginia, *West Indies, *West Virginia. 



Illustration: Lister, Mycetozoa ed. 3. pi. 157. 



This species is actually rare and not found often. The conical 

 shape will usually distinguish the form, but when the aethalia are 

 subglobose, they will resemble somewhat the smaller aethalia of 

 L. epidendrum, and may be perplexing. Some of the aethalia 

 may show an inclination to the conical shape, and the tops will 

 usually show the patches, or imperfect reticulation, instead of 

 warts. The species usually forms small developments in contrast 

 to the large ones of L. epidendrum. 



Suborder II. CALONEMATINEAE 



Sporangia simple; capillitium always present, forming a sys- 

 tem of uniform threads; spores yellow, red, or gray. 



Family I. TRICHIACEAE 



Capillitium consisting of tubular threads that are either free 

 and then called elaters, or combined into an elastic network; 

 thickenings in the form of spirals. 



Capillitium abundant, consisting of free elaters with spiral 



thickenings. 38. Trichia 



Capillitium scanty, consisting of free elaters with imper- 

 fect spiral thickenings; sporangia small, closely com- 

 pacted or heaped. 39. Oligonema 



Similar to Oligonema, but the capillitium branching and 



anastomosing to form a network. 40. Calonema 



Capillitium combined into a network, with spiral thick- 

 enings. 41. Hemitrichia 



