Trichia. 181 



Allied to Trichia nitens, but known by the much thinner 

 elaters. Forming crowded patches of considerable extent. 



Trichia advenula, Mass. (figs. 142 144). 



Sessile on a broad base, densely crowded or with a few out- 

 side scattered sporangia, circular, or subangular from mutual 

 pressure, rather depressed, primrose-yellmu, shining ; mass of 

 capillitium and spores orange; elaters cylindrical, 4 5 p thick, 

 usually inflated at one or loth ends, and also with 1 3 interstitial 

 swollen portions, the swollen ends terminating in a thin, straight, 

 or usually flexuous slender spine, 15 20 p long, spirals very 

 close, but little prominent, almost obsolete on the swollen 

 portions ; spores globose, minutely verruculose, 12 14 /x diameter. 



Trichia advenula, Mass., Rev. Trich., p. 336, fig. 38. 



On rotten wood. Glamis, N. B. 



Sporangia '5 mm. diameter, forming densely crowded patches 

 1 2 inches across. Most nearly related to Trichia minima, 

 but distinguished by the long, slender tips to the elaters, and 

 the interstitial swollen parts ; in T. minima the capillitium and 

 spores are pale primrose in the mass, and not orange as in the 

 present species. 



Trichia nana, Mass. 



Sporangia scattered or aggregated in small clusters, rarely 

 exceeding '5 mm. in diameter, sessile on a broad base, smooth, 

 pale bright ochre, opaque, wall very thin ; mass of spores and 

 elaters pale primrose yellow; elaters cylindrical, short, 3 4 p. 

 thick, spirals irregular, very distant, prominent, tips abrupt, not 

 apiculate, the spirals usually running quite to the end;, spores 

 globose, minutely verruculose, 6 8 /x diameter. 



Trichia nana, Mass., Mon Trich., p. 336. 

 (Type in Herb., Kew.) 



On wood. Westbrook, Maine, U. S. 



Sporangia hemispherical or sausage-shaped ; by far the 

 smallest of known species, resembling superficially T. minima, 

 from which it differs in the distant and prominent spirals of 



