81 



227. DIDYMIUM. Link Obs. I. p. 26. (Schrad. 

 gen. pl. et Fries. S. ]M. p. 113. part.) 



«Peridium subglobosum duplex, utruinque menibranose- 

 crustaceum, fragile ruinpens. Flocci intus versus basin 

 adnati. Columella intra peridium. Sporidia coacervaLa.« 



Abb. Nees sen. Fig. 104. Nees jun. Taf. 9. Fig. 1 — 6 



228. DIDERMA. Link Obs. I. p. 26! — 



»Sporangium (Peridium) subglobosum aut difTorme, duplex 

 utrumque niembranaceum, rumpens; externum saepe 

 squamulatim fatiscens. Flocci intus versus basin adnati. 

 Columella nulla. Sporidia coacervala.w 

 Abb. Nees jun. Taf. 9. 



229. LEANGIUM. Link Obs. L p. 26! 

 »Peridium simplexmembranose-crustacemn, rumpens. Flocci 



■ interne versus basin adnati. Columella intra peridium. 



Sporidia coacervata.« 

 Abb. Nees sen. Fig. 109. 



230. POLYSCHISMIUM. (Leangimn Trevelyani 

 Corda. Greville Scoll. crypt. flor. 3. 132.) 



Peridium simplex niembranaceum, dein., in lacinias aequales 

 stellatim-fissum. Columella basilaris, minula, capitata. 

 Capillitium ramosum, subrcticulatum. Sporidia coacer- 

 vata, discolora, simplicia. 

 Abb. Greville I. c. Taf. 1-32. Nees jun. Taf. 9. 



Sect. m. PERIDIUM OPEllCULATUM. 

 ^ 231. CRATERIUM. Trentepobl ap. Rotli. Cat. 2. 



p. 224. Link Ob. L p. 29. Fries Syst. IIL p. 148. 

 Peridium simplex cyathiforme, stipitatum, supra operculo 

 finiio heterogeneo, plerumque marginato clausuni. Co- 



l 



