GRAPHIDACEAE 59 



(m) Hypothecium clear or brownish t 



Xylographa 93 

 (n) Hypothecium black, carbonous 



Lithographa 93 

 n. Spores tran septate Aulaxina 94 



(y) Spores dark 

 m. Spores transeptate Encephalographa 94 



n. Spores finally muriform Xyloschistes 94 



y. Perithecia with 2-4 parallel hymenia 



(x) Spores i-celled Ptychographa 94 



(y) Spores transeptate Diplogramma 94 



(b) Algae Chroolepus 

 X. Asci many-spored ; spores filiform 



Spirographa 96 

 y. Agci i-8-spored 

 (x) Spores clear 

 m. Spores transeptate 



(m) Paraphyses simple and not united 

 r. Ends of paraphyses little thickened, smooth 

 (r) Spores i-septate *Digraphis 98 



(s) Spores 2-several-septate 



Graphis 96 

 s. Ends clavate and warted or spiny 



*Psorographis 102 

 (n) Paraphyses branched and united 



Opegrapha 94 

 n. Spores muriform 



(m) Paraphyses simple and not united 

 r. Ends of paraphyses not thickened, smooth 



Graphina 99 

 s. Ends of paraphyses clavate, warted or spiny 



fAcanthothecis loi 



(not Acanthothecium Speg.) 



(n) Paraphyses branched and united 



Helminthocarpum 102 

 (incl. Dictyographa 96) 



(y) Spores dark 



m. Spores i-septate Melaspilea 96 



n. Spores 2-several-septate Phaeographis gg 



o. Spores muriform Phaeographina 100 



(c) Algae Phyllactidium : spores transeptate 

 X. Spores clear; paraphyses branched and united 



Opegraphella 102 

 y. Spores dark; paraphyses simple and free 



Micrcgrapha 102 



(2) Thallus with a cortex: algae Chroolepus 



Subfamily Dirinae 105 

 (a) Spores elliptic to fusoid, 4-8-celled, clear 



Dirina 106 



