Discomycetse, Exoascaceae, Exoascus. 763 



it, Merid, tab. VII, fig. 25, — Ascis 3-5-sporis; sporidiis quadri- 

 locularibus 15 « 3,6. 



Hdb. in truucis et ramis Populi tremuhe in agro Vero- 

 nensi Ital, sup. 



ARTHOTHELIUM Mass. — Syll. X p. 77. 



1. Arthothelium atro-purpureum Starb.. Ascom. Regn. Exped. I, p. 9, 6866 

 t. I, f. 10, extr. — Ascomatibus in ligno dealbato laxe gregariis, 

 primo imraersis, dein erumpentibus, pulvinulatis, orbicularibus v. 

 subellipticis, 0,3-0,5 mm. diam., 100-200 u.. alt , disco pulveraceo 

 atro-purpureo v. subinde olivascente; ascis obpiriformibus, brevi- 



ter noduloso-pedicellatis, apice rotundatis, crasse tunicatis, 50-63 « 

 30-35, octosporis, paraphysibus conglutinatis superne septatis ob- 

 vallatis; sporidiis conglobatis oblongis utrinque obtuse rotundatis, 

 21-25 »9-11, transverse 6-8-septatis, non constrictis, septis non- 

 nullis longitrorsum partitis, hyalinis. 



Uah. in ligno vetusto ad oppidum Bahia Brasiliae. — Gonidia 

 nuUa. 



2. Arthothelium lariclnum Rehm, in .Jaap Ann. Mycol. VI (1908) 5866 

 p. 207 (nomen nudum}. 



Hab. in ramis emortuis Laricis decidu^e prope St. Ulrich 

 Austriae. 



Fam. 13. Exoaseacefe Sadeb. 



EXOASCUS Fuck. — Syll. VIII p. 816, X p. 69, XI p. 435, XIV 

 p. 823, XVI p. 803, XVIII p. 196. 



1. Exoascus nikkoensis (Kus.) Sacc. et Trott., Taphrina iiiJiJcoensis 6867 

 Kus., Bot. Mag. Tokyo XXI (1907) p. 65, cum icon. — Mvcelio 

 subcuticulari plerumque hypophyllo; ascis cylindraceis v, leniter 

 clavatis, apice rotundatis vel subtruncatis, 40-50 »10-13, cellulis 

 ba:silaribus rotundatis, 10-15 ^ 10-13, tunica tenuiori pr;editis; spo- 

 ridiis globosis v. ellipsoideis, plerumque 8 in quoque asco, 5 [x. d. 



V. 7 » 4-5. 



ZZa&. in foliis bullatis Aceris purpurascentis, prope Nikko 

 prov. Shimozuke Japonia. 



2. Exoascus ^scull (Ell. et Ev.; Flora Patterson, North Amer. pa- 5868 

 ras. Exoasc. t. IV, f. 1, Ascomyces deformans var. ^^sculi EIl. et 

 Ev., N. Amei-. Fungi n. 1887, Taphrina ^Escvli (EIl. et Ev.) 



