306 University of California PuMications in Botany [Vol. 6 



any ease. A similar coaleseenee of projections of spore surface is 

 found in G. intermedia to a much less marked degree. 



The form of the hymenium in this species seems to be a further 

 development of that of the species under Heterogenea in which are 

 likewise found, though less conspicuously, fascicled paraphyses and 

 strands of cortical tissue between groups of asci. In Genea cerehri- 

 formis the "pockets" of the hymenium are described by Fischer as 

 more or less strongly bent (1908, p. 145). This is due to the minute 

 lobing, previously described, of the ascocarp, the hymenium naturally 

 lying parallel with the surface. The partitions occur usually at the 

 bases of the small convolutions ; but there seems to be no definite rela- 

 tion of this kind, for in cases of larger convolutions, partitions are 

 found distributed promiscuously through the arch. 



Fischer states that the central hollow of the ascocarp opens to the 

 surface at various points at the bases of folds (1908, p. 145). It is 

 true that openings usually exist beneath several folds of a single asco- 

 carp, but so far as I have observed they are all connected, the original 

 single simple mouth described for Genea having here become exceed- 

 ingly irregular by the very decided lobing of the ascocarp. 



Hydnotrya Berk, et Broome emend. 



Ascocarp subglobose, surface generally folded or with projections 

 into exterior ; gleba penetrated by hollow chambers or labyrinthine 

 canals opening to surface usually between folds or into inward ex- 

 tending projections of surface ; canals lined with hymenium ; asci 

 forming palisade with paraphyses or more or less irregularly imbedded 

 in tissue below ; asci cylindrical, club-shaped, or long-ovoid, 6-8-spored ; 

 spores globose or ellipsoid, minutely or very coarsely papillose ; para- 

 physes more or less swollen at tips, at external openings of chambers 

 continuing into surface of ascocarp as swollen-tipped hyphae. 



No typical species of Hydnotrya have thus far been reported from 

 California ; but the two anomalous species referred to this genus differ 

 as widely from each other as from the type, and consequently can be 

 disposed of only by establishing two new genera or by enlarging the 

 original genus. The latter method is chosen at present ; first, because 

 only one preserved specimen of each exists, so far as I have been able 

 to discover; and, second, the dissimilar characters of the two in rela- 

 tion to the type species of the genus seem less important tlian the 

 characters which are similar. Further collection and study of these 

 plants, however, may make another arrangement necessary. 



