316 BKITISH DISCOMYCETES. 



GENUS IL- -ViBRissEA. Fries (amended). 



Aquatic fungi (except rimarum), bearing the exposed 

 hymenium on a plane or cup-shaped membranaceous 

 receptacle, stipitate or sessile, fleshy, firm, ejecting from 

 the asci 'slender elongated sporidia, which often remain 

 attached by their extremities to the surface of the 

 hymenium, giving it a velvety appearance (" Trans. 

 Linn. Soc.," ser. 2; "Botany," vol. 11, p. 5). (Plate X. 

 figs. 60, 61.) 



Name Vibro, to shake ; from the vibrating sporidia. 



ARRANGEMENT OF THE SPECIES. 



A. Stipitate . . . . . . . . . . species 1-4 



B. Sessile . . . . . . . . . . 5-7 



KEY TO THE SPECIES. 

 A. STIPITATE. 



Hymenium grey 



Hymenium orange-vermilion ; margin hispid 

 Hymenium golden-yellow or blood-red 

 , ( Exterior glaucous; stem squamulose .. 



' \Exterior dark brown, granulose . . . . 



rmcroscopica. 



Margarita. 



1 



truncorum. 



Ftrgussoni. 



B. SESSILE. 



Hymenium pallid, ochraceous, or grey ; externally 



bluish-black Guernisaci. 



Hymenium ochraceous-yellow ; margin thin and 



distinct turbinata. 



Hymenium pallid or straw-coloured ; externally 



lurid leptospora. 



A. STIPITATE. 



1. Vibrissea truncorum. (A. and S.) 



Fasciculate, gregarious or scattered ; hymenium 

 convex, golden-yellow or blood-red, forming, with the 

 membranaceous receptacle, an orbicular head ; stem terete, 

 glaucous, squamulose ; asci cylindrical ; sporidia 8, fili- 

 form, multiseptate, 250 X 1/i ; paraphyses very slender, 

 branched, slightly enlarged at the summits. (Plate X. 

 fig. 60.) 



Vibrissea truncorum (A. and S.) Fries, "Sys. Myco.," 

 11, p. 31; "Summa Veg. Scan.," p. 360. Leotia trun- 



