16 



Campbellia. Pileus stipitate, gelatinous, drying horny ; tubes large, angular, 



edge frequently serrate or dentate ; like Boletus but tremelloid. 

 BBB) Hymenium on awl-shaped projections. 

 Protohydnum. Plants resupinate, tremellaceous, otherwise as in Hydnum. 



(Hedw. vol. 35, p. XII, 1896). 

 TREMELLODON. Plants standing out from substratum, pileate, hymenium 



below. 

 Mycodendron. Plants dendroid; stipe dilated below, bearing above several pilei 



in acropetal succession ; pilei gelatinous ; hymenium tubercular or with 



irregular folds. 



Fam. Vin. Dacryomycetaceae; 



Key to the genera of the Dacryomycetaceae. 



Ai) Plants of various form, but not inflated and constantly hollow ; basidio- 

 spores not in chains. 

 B) Plants small, cushion form, globose, or cup-shaped, sessile, surface gyrose. 

 DACRYOMYCES. Plants cushion form, surface gyrose ; basidiospores septate 



at maturity or upon germination ; conidia when present in chains. 

 Seismosarca. Plants subglobose, or lobed, gyrose, sessile ; basidiospores con- 

 tinuous, colored. 

 BB) Plants more or less erect stipitate or spathulate ; context firm, 

 a) Cylindrical, terete, simple or branched. 



CALOCERA. Gelatinous, drying horny, 

 aa) More or less expanded, 

 b) Spathulate or cup-shaped, or more or less compressed and inequi- 

 lateral. 

 GUEPINIA. As above, spores curved. 



bb) Capitate. 

 Dacryopsis. Capitate on short stalk; hymenium bearing conidia on short lateral 



branches among the basidia ; basidiospores continuous or septate. 

 Dacryomytra. Clavula ovate-conic ; basidiospores three-septate, lunate, basidia 



one-spored. 

 Collyria. Clavula inflated, filled with gelatinous substance, stipe hollow. 

 Ditiola. Clavula disk-form ; basidiospores one-septate. 

 BBB) Plants very thin, effuse, or if stipitate, then context floccose from loose 

 threads. 

 CERACEA. Effused, agglutinated, very thin, waxy, basidiospores globose. 

 Arrhotidia, effused or sub-spathulate, hymenium somewhat waxy, smooth, not 



wrinkled ; basidiospores oblong. 

 A^) Plants subglobose, hollow ; basidiospores not in chains. 

 Apyrenium. Plants sessile, basidiospores continuous. 

 Collyria. Stipitate, stipe hollow ; capitulum globose, inflated, filled with a 



gelatinous substance. (See under section above). 

 A") Basidiospores in chains ; plants subgelatinous. 



HORMOMYCES. Plants globose-pulvinate ; gyrose-phcate ; hyphae radiating, 

 forked or branching, bearing at the apex spor.es in chains. 



(Hormomyces, Apyrenium, and Ditiola are doubtful genera.) 



