NOTICES OF NORTH AMERICAN FUNGI. » 



781. Rhytisma tostum. B, S{ C — Tenue in maculam luteam 

 sitiim, gyrosum hie illic tantum fertile. 



On leaves of Quevcus lancifolia. Alabama, Beaumont. 



Seated on yellow spots, thin, gyrose, only here and there pro- 

 ducing fruit -bearing perithecia, which soon shell off. Undoubtedly 

 distinct, but the specimens are imperfect. 



782. Rhytisma monogramme. B. cj- C. — In maculam brunneam 

 nigro-marginatam situm ; peritheciis hysteriiformibus solitariis. 



On leaves of Vitis cestivaiis. Seated on brown spots, which have 

 a black border, hysteriiform, perithecia solitary. A very singular 

 species, of which further information is desirable. 



783. Rhytisma exythrosporum. B. Sf C. — Minutum dentato- 

 apertum, sporidiis subfusiformibus utrinque apiculatis salmoni- 

 coloribus. 



On leaves of Qiiercus vii-ens. California. Proc. Am. Ac. iv., p. 

 128. 



Minute, opening with two or three lacinise ; asci swollen ; spo- 

 ridia -0013 long, salmon-coloured, subfusiform, apiculate at either 

 extremity. 



784. Astezina orbicularis. B. <f; C— In maculas orbiculares dis- 

 posita; ascis obovatis; sporidiis oblongis obtusissimis curvatis uni- 

 septatis. 



On leaves of Ilex opaca. Car. Inf. No. 2046, 2373. On 

 Prinus coriacea. Car. Sup. No. 3443. Ravenel. No. 231. 



Forming orbicular black spots, in which the substratum is either 

 quite continuous or interrupted; asci short, obovate; sporidia oblong, 

 curved, very obtuse, uniseptate. 



785. Asterina decolorans. B. a> C — Maculis orbicularibus un- 

 dulatis ballatis ; peritheciis punctiformibus ; mycelio parco ; ascis 

 brevibus ; sporidiis uniseptatis. 



On some unknown leaf. New Jersey. No. 4684. 



Spots orbicular, rufous, undulated and bullate; mycelium sparing, 

 consisting of a few moniliform threads, and others which are inar- 

 ticulate ; asci short, oblong; sporidia uniseptate, '0004 long. 



786. Astexina conglobata. B. ^ C. — Peritheciis globosis con- 

 glomeratis ; ascis obovatis sporidiis breviter subfusiformibus uni- 

 septatis. 



On Arhutus iiva ursi. No. 5865. 



Globose, minute, conglobated, seatei on a few slender threads; 

 asci obovate ; sporidia shortly subfusiform, uniseptate. 



787. Astexina diplodioides. B. ^ C. — Maculis orbicularibus, my- 

 celio interrupto ; sporidiis oblongis obtusissimis uniseptatis fuscis. 



On leaves oi . Andromeda acuminata. Alabama, Peters. No. 

 4511. 



Forming orbicular interrupted spots ; perithecia minute ; sporidia 

 •0003 long, shortly oblong, obtuse at either end, brown, resembling 

 the spores of a Diplodia. 



