Pyrenomycetce, Sphceriacete, Phpeophrag-mire, Thyridaria. 741 



Hab. in ramis corticatis Ribis laxiflori, Siska Alaska (Tre- 



lease). — Sociae adsunt Rhynchophomce, Godronicu et Diaporthes spp. 



2. Pseudovalsa canadensis Ell. et Ev. in Journ. of Mycol. 1903, 2r>GG 

 p. 224. — Peritheciis 0,5-0,8 mm. cliam., in ligno immersis, spar- 



sis vel 3-4 congestis, ostiolo papillato paullo emergente donatis ; 

 contextu subcoriaceo nigro ; ascis 150-250^8-10, cylindraceis, 

 summo rotundatis, paraphysibus numerosis, filiformibus, guttulatis 

 hyalinis obvallatis; sporidiis cylindraceis, utrinque obtuse acumi- 

 natis, 7-10-septatis, luteo-brunneis, 23-30 v 7-8. 



Hab. in pariete interiore corticibus Cratsegi, London, Canada, 

 Amer. bor. 



3. Pseudovalsa minima Ell. et Ev. in Journ. of Mycol. 1933, p. 224. 2567 

 — Stromatibus orbicularibus vel ellipticis 1-2 mm. latis, vertica- 

 libus, a matrice sursum nigrificata et circumcirca pallidiore for- 

 matis ; peritheciis ab imo stromatis immersis, 2-6 in siugulo stro- 

 mate congestis, globosis vel ovatis 400 jl. diam. ; ostiolis subconicis, 

 paullo emergentibus; ascis cylindraceis 100-120 «7; sporidiis mo- 

 nostichis, oblongo,-ellipticis 3-saptatis, parce constrictis, olivaceo- 

 brunneis 12-15 « 3,5. 



Hab. in corticibus Aceris saccharini, London, Canada, 

 Amer. bor. 



THYRIDARIA Sacc. — Syll. II p. 140, IX p. 821, XI p. 331. XIV 



p. 578. 



1. Thyridaria Sebillei Sacc. et Flag. in Atti Congr. bot. Palermo 1902, 2568 

 p. 53. — Peritheciis in soros minutos, insequales (3-6) aggregatis 



v. interdum subsolitariis, stromate fuscescente parvo subcorticali 

 connexis, globulosis, dein erumpentibus peridermioque laciniato 

 cinctis, atris, rugulosis, 350 ;j.. cliam., coriacellis; ostiolo obtuso 

 brevissimo; ascis cylindraceo-clavatis, 140-163 « 14-16, apice rotiin- 

 datis, copiose filiformi-paraphysatis, sensim tenuato-stipitatis, octo- 

 sporis; sporidiis distichis, cylindraceo-oblongis, subrectis, utrinque 

 paullulum tenuatis rotundatisque 28^7,5-9, fuligineis utrinque 

 dilutioribus, 9-5-septatis, ad septa, praecipue medium, constrictis. 

 Hab. in ramis corticatis emortuis Crataegi v. Pruni, Rigny 

 sur Arroux Galli.o. — Species distincta, cl. ab. R,. Sebille dicata. 



2. Thyridaria Sambuci (Karst.) Sacc. — Syll. II, p. 141. — f. Fagi 2559 

 Feltg. Vorstud. Pilz. Luxemb. Nachtr. III, 1903, p. 122. — A 

 typo differt poritheciis sempor valsoideo-aggregatis, cortice nidu- 



