98 NATURAL HISTORY BULLETIN 



Lachnea pygmma Gill. Discom. 71. 1879. 

 Lachnella pygmcea Phill., Brit. Discom. 242. 1887. 



Plants thickly gregarious, 2 to 3 mm. in diameter with a dis- 

 tinct stem which varies much in length, externally hairy, pale 

 yellowish; stem often branched; hairs not so numerous as in the 

 preceding; asci clavate, 8-spored; spores elliptical or subclavate, 

 hyaline, about 7 to 10 by 2/* paraphyses filiform. 



On roots and twigs partially exposed, Iowa City. 



The plants were numerous and grew with the stems often to- 

 fully pilose ; hymenium concave ; asci, 8-spored ; spores cylin- 

 drical or oblong, simple, hyaline ; paraphyses present. 



TEICHOPEZIZA Fuckel, Symb. Myc. 195. 1869. 



Cups fleshy-coriaceous, for the most part small, only a few mm. 

 in diameter, sessile or subsessile, when dry becoming closed and 

 globose, when moist more or less expanded, externally beauti- 

 fully pilose ; hymenium concave ; asci, 8-spored ; spores cylindri- 

 cal or oblong, simple, hyaline ; paraphyses present. 



KEY TO THE SPECIES. 

 Hairs hyaline, appearing white to the naked eye. 



On branches of basswood T. tilice. 



On decaying oak leaves T. comata. 



Hairs sulphur-yellow becoming brownish when dry. 



Plants oecuring on wood, spores 6 to 8/m long. . . T. aJbo-lutea. 

 Plants on herbaceous stems, spores 16 to 20fi 



long T. sulphurea. 



Trichopeziza tili^ (Peck) Sacc, Syll. Fung. 8 : 428. 1889. 



Peziza tiliae Peck, Ann. Rep. N. Y. St. IMus. 24 : 96. 1872. 

 Plate 25, f. i. 



Plants gregarious, minute, 1 to 2 mm. in diameter, sessile, con- 

 cave, closed when dry, expanding when moist, externally dense- 

 ly clothed with hyaline (white) hairs; hairs delicately rough- 

 ened externally ; hymenium pale yellowish or Avhite ; asci pres- 

 ent but spores not seen. 



On dead branches of basswood {Tilia americana), Unionville, 

 Iowa. 



One collection of the plants of this species has been made in 



