304 University of California Publications in Botany [Vol. 6 



crowding of spores, papillae often rubbed off from surface; para- 

 physes 4/i, in width, compressed in groups between crowded asci. 



"Under Lihocedrus, Alta, Placer Co., Calif., May." 



No. 98, Hk. Col. Type. 



Only two small portions of a plant, each about 7 mm. in diam., are 

 now present in the Harkness collection, and therefore such points as 

 size, shape, the presence or absence of an external opening and of pro- 

 jections from the inner wall, cannot be determined with certainty. In 

 the material studied, however, the wall of the ascocarp is comparatively 

 even, there being only slight lobing ; no indications are found of inner 

 projections ; and an external opening was apparently originally pres- 

 ent. The latter character may have been overlooked by Harkness as 

 it apparently was overlooked in his genus Myrmecocystis. However, 

 plants which in all other respects answer perfectly to the description 

 of Genea but which lack an opening are found in the University of 

 California collection ; and even the absence of this character, there- 

 fore, would not seem sufficient alone to debar the species from this 

 genus. Its transference to Genea from Hydnocystis, where it was 

 placed by Harkness, is justified by the presence of a secondary cortex 

 formed by the paraphyses. Because of its spore shape and size and 

 the densely crowded arrangement of the asci and paraphyses, how- 

 ever, it cannot be separated from Myrmecocystis upon the old basis of 

 distinction between the latter and Genea, and must therefore be con- 

 sidered under Genea in the enlarged sense. 



Since the specific name compacta has already been used by Hark- 

 ness in connection with Genea, the name intermedia is proposed. 



Genea cerebriformis (Hk.) comb. nov. 



Myrmecocystis cerehriformis Hk., Proe. Cal. Acad. Sci., 3d ser., vol. 1, no. 8, 

 p. 269, pi. XLV, figs. 28a-28c; Bot. Zeit., 1908, p. 145, pi. VI, figs. 1-3, 

 Ed. Fischer. 



Myrmecocystis ca^ididum. Hk., Proc. Cal. Acad. Sci., 3d ser., vol. 1, no. 8, 

 p. 269, pi. XLV, figs. 29a-29e. 



Pseudogenea calif arnica Fischer, Ber. deutsch. Bot. Ges., 1907, p. 372. 



Ascocarp creamy white, 1 cm. in diam., very irregular in form with 

 conspicuous convolutions, these in turn being minutely convoluted ; 

 surface covered by minute mostly conical verrucosities ; cavity of asco- 

 carp dissected by infolding of and projections from wall into system 

 of labyrinthine canals ; inner wall more minutely verrucose than outer ; 

 cortices composed of large-celled pseudoparenchyma to somewhat be- 



