ASCOMYCETES 369 



spores subdistichous, ovate-oblong, or fusoid, i- then many- 

 septate, both ends sometimes papiilately-apiculate, hyaline. 



Herpotricha nigra, Hartig, Hedw.> 1888, p. 13. My- 

 celium blackish-brown, widely effused, slender, furnished 

 with haustoria, attacking living leaves which it lulls ; 

 perithecia subglobose, black, 0*3 mm. diam., clothed with 

 long deflexed hairs towards the base; asci 76-100X12 //,; 

 spores distichous, i- soon 3-septate, constricted at the 

 middle, 4-guttulate. 



Acanthostigma, De Not., Sfer. ItaL, p. 85. Perithecia 

 free, spherical, fragile, clothed with setae or hairs, papillate, 

 with a perforate mouth; asci 8-spored; spores elongate- 

 fusoid, 1-5 septate, hyaline ; paraphyses present in some, 

 absent in other species. 



Acanthostigma parasiticum, Sacc., Syll., vii. 855. 

 Perithecia subglobose, minute, mouth distinct, the upper 

 portion with rigid, divergent bristles, o 1 1-0*25 mm. diam., 

 and with the bristles o"j mm. diam. ; asci 50 \L long, soon 

 disappearing; spores fusoid, straight, or curved, smoky-grey, 

 15-20 //. long, soon 2-3-septate. 



Spores continuous, coloured. 



Rosellinia, De Not. Perithecia subsuperficial, sub- 

 globose, papillate, subcarbonaceous, black, glabrous, or 

 hairy, or seated on a byssus ; asci cylindric or cylindric- 

 clavate, 8-spored, spores continuous, broadly ovate or 

 elongated and cymbiform, brown, with or without append- 

 ages ; paraphyses present. 



Rosellinia quercina, Hartig, Baumkrankh., p. 100, pi. 

 8, 9. Perithecia scattered or subgregarious, seated on a 

 black byssus or' subiculum, large, black, globose, obtusely 



2 A 



