108 FUNGUS-FLORA. 



HETEROSPHAEEIA. Grev. (figs. 47-51, p. 12.) 



Ascopliore erumpent, becoming superficial, globose but 

 depressed above ; at first closed above by a thin membrane 

 and slightly umbilicate, then expanding and exposing the 

 disc, margin ragged, coriaceous, dark-coloured; asoi elon- 

 gated, spores 8, septate at maturity, hyaline; paraphyses 

 slender. Pycnidia are present in some species. 



Heterospliaeria, Greville, Scot. Crypt. Fl., p. 103, pi. 103 ; 

 Phil., Brit. Disc, p. 371, pi. xi. f. 71 ; Sacc, Syll., 8, p. 775. 



Not closely allied to any other British genus. The spores 

 remain for a long time continuous, but become 3-septate 

 when quite mature. 



Heterosphaeria patella. Grev., Scot. Cr. Fl., p. 103, 

 pi. 103 ; Phil., Brit. Disc, p. 371, pi. xi. f. 71 ; Sacc, Syll., 

 n. 3187. (figs. 47-51, p. 12.) 



Scattered, erumpent becoming superficial, subglobose and 

 depressed above, sessile, umbilicate then expanding, the 

 margin torn and sometimes finely striate, olive then blackish, 

 coriaceous ; disc pale ; J— f mm. across ; asci cylindric-cla- 

 vate, spores 8, irregularly biseriate, elliptic-oblong, smooth, 

 hyaline, often very slightly curved, continuous for a long 

 time, then 1-3 septate, 14-16 x 4 /a; paraphyses filiform, 

 apex fusiformly incrassated. 



Pycnidia. Eesembling the ascophore, stylospores slenderly 

 fusiform, both ends acute, hyaline, about 26 X 3 ;«,, sterig- 

 mata short, filiform, usually branched. 



On dead herbaceous stems, more especially umbellifers. 



Phillips says that asci and stylospores are sometimes asso- 

 ciated on the same disc, and it is very probable that the asci 

 always follow the stylospores. 



SCUTULAEIA. Karsten. (figs. 21-26, p. 91.) 



Ascophore erumpent, soon becoming quite superficial, orbi- 

 cular, patellate, sessile, somewhat coriaceous or horny, mar- 

 gin entire or ragged; asci clavate, 8-spored; spores elon- 

 gated, very slender, multi-guttulate or multi-septate ; hya- 

 line or with a slight tinge of colour ; paraphyses present. 



