(345) 



above, smooth above, minutely furfuraceous below, waxy 

 white above, gray or pallid below, hollow, cartilaginous ; flesh 

 w r hite, unchanging, taste and smell mild. 



Stanford University, Calif., Nov., 1901, C. F. Baker, no. 

 90. 



This exceedingly delicate, fragile species is somewhat 

 closely related to Psathyrella disseminata Pers., from which 

 it may be distinguished by its still smaller size, paler color, 

 and by the very light colored hyaline spores that do not 

 blacken the gills. The spores too are symmetrical, not inequi- 

 lateral as in that species. 



Hypodermataceae. 



Hypodermopsis gen. nov. 



Ascoma elongate, black, minute, confluent with the host 

 tissues (as in Hy-podermd) ; ascospores elliptic or spindle- 

 shaped, brown, two or more septate. 



This is not to be confounded with Rhytidhysterium, al- 

 though the spore characters are the same. In the latter genus 

 the ascoma is fully erumpent with inrolled lips that expand 

 to discoid when moistened. It should probably be placed in 

 the Cenangiaceae rather than in the Hypodermataceae. This 

 familv when properly defined forms a natural group in which 

 the elongated ascoma is buried, having its walls more or less 

 completely blended with the host tissue. The structure is 

 comparable to that of Rhytisma in the Phacidiaceae or of 

 Phyllachora in the Dothideales. 



Hypodermopsis sequoiae sp. nov. 



Ascomata scattered, broadly elliptic or subangular, promi- 

 nently convex, the margin confluent with the epidermis, 

 smoothish or somewhat wrinkled, the lips closely connivent, 

 forming a subprominent medial line, about ^-1 x %-%. mm. ; 

 asci subcylindrical, 70-75 x 8-1 o fi ; paraphyses abundant, 

 thread-like, forming a poorly defined epithecium ; ascospores 

 distichous, subspindle-shape, olivaceous, 3-septate, not con- 

 stricted, about 18x6 u. 



On dead twigs and needles of Sequoia sempervirens, Sum- 



