TRICHIA 2 1 1 



1872. Trichia reniformis Peck., Rep. N. Y. Mtis., XXVI., p. 74. 

 1875. Trichia contorta Rost., Men., p. 259. 



1891. Trichia andersoni Rex, Proc. Phil. Acad., p. 395. 



Sporangia gregarious, or crowded, small, ellipsoid or reniform, 

 arcuate, dark red brown, sessile ; hypothallus none ; capillitial 

 mass ochraceous or dull yellow, the elaters few, irregular, the 

 spirals uneven, irregular, often projecting and thin, though 

 generally flat or obscure, the apices more or less swollen, end- 

 ing in a curved tip ; spore-mass concolorous, spores beneath the 

 lens bright yellow, papillose, 10-12 p. 



This species resembles the preceding in color, but is of less 

 aggregate habit, and the sporangia are more plasmodiocarpous, 

 reniform, arcuate, etc. The capillitium is also distinctive, the 

 sculpture irregular, uneven with general lack of symmetry. 

 Our description is made up from specimens of T. reniformis 

 Peck, which appears to be the American form of Rostafinski's 

 species. T. andersoni Rex is perhaps the same, if one may 

 judge from the scanty material now available for study. The 

 species is to be looked for on fallen stems of deciduous trees 

 in mountainous regions. 



Rare. New York, Montana? 



3. TRICHIA IOWENSIS Macbr. 



PLATE III., Figs. 3, 3 a, 3 b ; PLATE X., Fig. 5. 



1892. Trichia iowensis Macbr., la. Bull. Lab. Nat. Hist., II., p. 133. 



Sporangia sessile, gregarious, spherical or reniform, with 

 no hypothallus, purple brown ; spores and spore-mass yellow ; 

 elaters with three or four spiral bands unevenly distributed, 

 and with occasional inflations, sparingly branched, spinulose, 

 especially where inflated ; spinules long, 3-6 ^, recurved, often 

 bifid or trifid, especially at or near the acuminate tip ; spores 

 delicately warted, 9-11 j u. 



This species occurs not rarely and is found on the bark of 

 Populus, so far, exclusively. The sporangia are inconspicuous 

 until opening by fissure they display the yellow spores and 



