Perisporiaceas, Erysiphese, Sphserotheca. * 3 



4. Podosphaera Schlechtendalii Lev. Disp. meth. Erys. p. ii9 t. 6. ^ 

 fig. 7. — Hjpophylla; peritheciis globosis rainutis sparsis ; appeii- 

 dicibus parcis, longissimis, perithecii diametrum decies superanti- 

 bus, ramulis filiformibus cirrhosis. 



Hab. Nenilly prope Parisios ad folia Salicis albae et vi- 

 minalis. 



5. Podosphaera biuncinata C. et Peck 2^ Rep. p. 94. — Mycelio tenui ; 5 

 peritheciis minutis, nigris ; appendicibus 6-10, longissimis, hyali- 

 nis, bi-uncinatis, apicibus quandoque repetito-divisis ; asco glo- 

 boso, octosporo. 



Hab. in Amer. boreal., Poughkeepsie, New-Baltimore etc. in 

 foliis Hamamelidis virginianas. — Appendicularum rami 

 curvuli, fere rectangulo-patentes. 



SPHyEROTHECA Lev. in Ann. Scienc. nat. 1851 XV. p. 138 (Etyra. 

 sphcera et theca, h. e. ascus spha^ricus). — Perithecia monoasca, 

 appendicibus floccosis vagis mycelio intertextis cincta ; ascus glo- 

 bosus, octosporus; sporidia ovoidea, continua, hyalina. — St. co- 

 nidicus Oidii erysiphoidis v. leucoconii formas sistit. 



Clavis specierum. 



Species calyci - foliicolce ; appendi- ( mycelium crassum pannosum pannosa 

 ces hyalinae l raycelium tenue pruinosum pminosa 



I ( ascusamplus Castaqnei 



c • /- 1 ■ 1 . ^ , l vage ramosae l / ... ... 



Species fohicolas; appendices fuh- \ K ascus mmor Nicsslti 



gineae j setiformes, simplices, copiosse Epilobii 



( parcissimse v. nullae . detonsa 



Species fructicola Mors-uvce 



1. Sphaerotheca pannosa (Wallr.) Lev. Ann. Scienc. nat. 1851 XV. 6 

 p. i;58 t. 6 fig. 8. Alphitomorpha pannosa Wallr. (1819). — My- 

 ceUo lanuginoso, dein pannoso, persistente; peritheciis minutis, 

 globosis, sparsis ; appendicibus floccosis, hyalinis, perithecio bre- 

 vioribus; ascis globulosis; sporidiis octonis ovoideis. 



Hab. in foliis, calycibus ramulisque Rosarum cultarum, pe- 

 rithecia plerumque in calycibus raraulisque tantum, in Anglia, 

 Gallia, Belgio, Italia, Germania, Amer. bor., India. — St. coni- 

 dicus Oidium leucoconiurn Desm. sistit. 



2. Sphserotheca pruinosa C. et Peck 25 Rep. p. 94. — Ilypogena; 7 



mycelio tenui, efFuso, persistente; peritheciis minutis nigris; ap- 

 pendicibus parcis, longis, hyaiinis; asco ovato, octosporo. 



