Discoraycotca), Gyranoascuceie, Exouscus. 810 



videliir, absque inycelio pereunaiite; ascis vulpo liypopliyllis (la- 

 t(M'(iuin tainen epipliyllis), in maculis exaridis, planis, siL-po conflu- 

 (•ntibus pruinoso-oirusis, oblongis, obtusis -J()-'M = 12-n, cellula ba- 

 silari (inter parietes latoralos dissociatos collularum opiderinidis 

 cuneiformi-innixa), forina et magnitudine variabili, ut [ilurimum 

 tamen iisdein breviore, suffultis; sporidiis vulgo octonis globosis 

 :.-7. a. d. 



llab. in foliis Ostrya; car pin i fol ia) in vallo Tregnago 



noc noii ad podes mt. Baldi prope Rivolta, prov. Voron. Ital. bor. 



I. Exoascus Ulmi Fuck. Symb. .\pp. II, p. 140, Sadeb. Exoasc. ^^'^^ 



p. 120, f. 14-15. — Disculis in foliornm pagina inforiori, teuuis- 



-ime effusis, maculas 2-20 mii!. magnas, irregularitor orbiculares, 



jrisoo-fuscas, plerumqne pallidius limitatas formaiitibus; ascis cy- 



iidraceis, antice rotundatis, basi truncatis, Ssporis lG-20:;8-10; 



"llula basilari 15-17 ■j.. lata, 3-6 u. alt. sporidiis perfecto globo- 



>is, nucleatis, continuis, hyalinis, 1,5-4 ■/. 



Hab. in pagina iiiferiore foliorum U 1 m i c a m p e s t r i .s et m o n- 

 t a II a» in Germania, Austria, Italia et Suecia frequens. 



t, II. Taphrinella Sacc. Asci cellula basilari carentes. 



12. Lxoascus Potentillae (Farl.) Sacc. .[scomyces Potentilic (Farl.) 3:152 

 Phill. Disc. p. 402, Exoasc. defovmans var. Potentilhv Farl. Proc. 

 Amer. Acad. 1883, p. 84, Taphrina Tormentillic Rostr. Ilerb. — 

 Hyphis sterilibus intestinis, fertilibns sub epidermide in strato to- 

 uuissimo consociatis; ascis clavatis, apice rolundatis v. truncatis 

 20-35;; 7-10, deorsum in pedicellum 20-25 [x. longum attenuatis, e 

 mycelio subepidermico prodeuntibus, suboctosporis; sporidiis ovato- 

 oblongis, 5-8 ,u. long. 



Hab. \i\ foliis caulibusque vivis Potontillai To r me n t i 1 la?, 

 P. geoidis, P, canadensis in Amer. bor., Suecia, Britannia 

 •L Germania. — Sec. Robins. Taphr. p. 172, sporidia sunt globu- 

 •sa, i)-4 i. diam. 



Exoascus purpurascens (Robins) Sacc, Taphrina Rob. Not. Taphr. ^^^'^ 

 p. 109. — Folia crispata et atro-purpurea reddeus; ascis ainphi- 

 genis, obclavatis, medio subconstrictis, 24-32^9-14, basi 10-20 •/. 

 lat.; cellula basilari nulla; sporidiis ellipsoideis, 3,5-5 = 2,5-4. 



Hal/. in foliis Rii o is copallina?, Massachussots, Connecticut, 

 New-Jersey .\mer. bor. 

 1 I Exoascus filicinus (Rostr.) Sacc, Taphrina Rost. in Johaus. 33.>l 



