}()0 NATURAL HISTORY BULLETIN 



ters by which the species may be recognized. On microscopic- 

 examination the long fusiform spores are characteristic. 



Trichopeziza albo-lutea (Pers.) Sacc., Syll. Fung. 8: 412. 



1889. 



Peziza sulphurea albo-lutea Pers., Syn. Fung. 649. 1801. 

 Helotium albo-luteum Karst., Myc. Fenn. 1: 160. 1871. 

 Peziza flavo-fuliginea A. & S., Consp. Fung. 319. 1805. 

 Peziza variecolor Fries, Syst. Myc. 2 : 100. 1822. 



Plants similar in general appearance to the preceding but 

 larger often 2 mm. in diameter and expanded, when dry becom- 

 ing closed or partially closed; hymenium smooth, whitish or 

 slightly yellowish, externally clothed with sulphur-yellow hairs, 

 which become brown when dry (to the naked eye) slightly rough 

 on the exterior, often a little enlarged at their apices ; asci cylin- 

 drical to clavate, 8-spored; spores elliptical or slightly clavate,. 

 straight or curved, 7 to 8 by 2fi; paraphyses present. 



On old wood, Mt. Pleasant, Iowa. 



This species was originally described as a variety of the pre- 

 ceding which it resembles in external characters but is very dis- 

 tinct in the size and form of the spores. The plants occur gre- 

 garious on old but rather hard wood and this habitat with the 

 generally large size of the plants would enable one to distinguish 

 it from T. sulphurea (Pers.) Sacc. which always occurs on her- 

 baceous stems. The color is a very prominent character in both 

 species but the plants when dry change their external appear- 

 ance from sulphur-yellow to chestnut brown. On microscopic 

 examination the hairs are found to show their original color- 

 when moist. 



PHIALEA (Pers.) Gill. Discom. 93. 1879. 



Pkialea (as subgenus) Pers., Myc. Eu. 1: 276. 1822. 



Apothecia waxy-membranaceous, at first closed, then spread- 

 ing, concave or convex, smooth or pruinose, with rather long, 

 slender stem, and even margin (not dentate) ; asci cylindrical 



