52 NOTICES OF NORTH AMERICAN FUNGI. 



* Txichocoma paradoxum. Jungh. — On Laurus Caroliniensis . 

 Car. Inf. No. 2565. 



340. Reticulata affinis. B. $ C— Effusa tenuis papillosa atro- 

 purpurea margine tenui ; sporis oblongis ; capillitio brevi ramoso, 

 Berk., in Jonrn. Linn. Soc., v. x., p. 347. On dead trees which 

 have not yet fallen. Car. Inf. No. 3012. 



Effused, thin papillose, black-purple ; margin thin ; threads 

 short, erect, branched; spores oblong, •0004--00025 long. 



341. Spumaxia UfXichenexi . B. — Effusa reticulata gilva ; sporis 

 globosis magnis kevibus. On very rotten wood. Pennsylvania. 

 Michener. No. 4110. 



Effused, reticulate, pinkish yellow or slightly fulvous ; spores 

 globose, -0013-'001 in diameter. S. licheni/ormis, Schwein., is a 

 state of Didymium cinereum. 



342. Didexma ochxoleucum. B. & C. — Gregarium congestum 

 sessile, peridio exteriore ochroleuco, interiore albo ; columella nulla ; 

 sporis atris ; floccis albis. On bark. Pennsylvania. Michener. 

 No. 4083. 



Gregarious, crowded together ; external membrane ochroleucous, 

 internal white ; columella none ; spores black. 



* Didexma spumarioides. Fr.— On moss. Car. Inf. No. 5001. 



343. Didexma concinnum. B. % C— Sessile laBvissimum candi- 

 dum nitidum fragilissimum 'intus rufulum ; columella obscura, spo- 

 ris aterrimis. On a minute moss running over very rotten wood. 

 Car. Inf. No. 3021. 



Extremely neat, brittle, looking like a little egg, quite even, 

 white, pale rufous within ; columella slightly developed ; spores 

 jet black. 



* Didexma stellare. P.— On pine wood. No. 2171. 



* Angioxidium valvatum, Fr. Ind. Syst. Myc. Diderma pallidum. 

 B. & C. On pine leaves. Car. Inf. No. 1972. 



* Didymium clavus. Fr.—On dead leaves. Car. Sup. No. 

 251. Canada, Poe. No. 6137. 



344. Didymium exythxinum. B.— Stipite a?quali peridioque glo- 

 boso cinnabarinis sporis atris, floccis albis. On pine wood. 



Stem equal, vermillion, as is the globose peridural ; spores black, 

 flocci white. The pulverulent matter with which the peridium is 

 clothed soon rubs cff. 



* Didymium xanthopus. Fr. — On dead leaves, &c. Car. Inf. 

 No. 1176, 2040. Car. Sup. No. 245. 



345. Didymium pxoximum. B. $ C. — Stipite subajquali rufo 

 penetrante e basi orbiculari oriundo ; peridio globoso granulato 

 albo, floccis albis. On dead pine leaves. Car. Inf. No. 2987. 



Stem rufous, nearly equal, springing from an orbicular base, pene- 

 trating the globose white granulated peridium ; flocci white. In 

 this last character it differs essentially from D. xanthopus. 



