46 



DISCOMYCETES. 



Cup 1J inches broad; stem 1 to 1J inches long, J 

 inch and more thick, terminated by a few rooting fibrils ; 

 sporidia immature, according to Berkeley, 25 X 12^u, 

 apparently elliptical, larger than in P. ciborium ; the 

 asci are considerably larger, and of a different character 

 (Cooke). 



On the ground (Mr. H. C. Spencer Perceval in Herb. 

 Berk.). On a lawn under lime-trees, Glamis Castle 

 (Rev. J. Stevenson). 



Subgenus II. — Taezetta. Cooke. 



Cup nearly entire, naked, stipitate ; stem slender, 

 varying in length, erect or rooting. (Plate III. fig. 12.) 

 Name — (?) Tazzetta (Ital.), a little cup. 



Arrangement of the Species. 



a. Stem erect. 



(a) Sporidia elliptic, rough . . . . species 4 



(b) Sporidia elliptic, smooth . . . . „ 5-7 



b. Stem rooting. 



(a) Sporidia elliptic, smooth . . . . „ 



Key to the Species. 



Stem erect 

 Stem rooting 



{Margin lobed ; sporidia rough . . . . . . . . petahidea. 



Margin entire ; sporidia smooth . . . . . . muralis. 



Margin crenulate . . . . . . . . . . 2 



9 (Fawn colour, farinose . . . . . . . . . . cupularis. 



' (Flesh colour, glabrous . . . . . . . . . . carnea. 



i Cup turbinate; flesh thick, very fragile .. .. ammophila. 



Cup becoming plane or deflexed ; flesh thin, fragile . . rapulum. 

 Cup always concave, flesh thin, fragile ; stem shorter 



than two preceding . . . . . . . . . carbonaria. 



8-10 



1 

 3 



A. STEM ERECT. 



(a) Sporidia elliptic, rough. 



4. Peziza petaloidea (nov. sp.). Cooke and Phil. 



Cup expanded, lobate, fleshy, firm ; hymenium rugose, 

 sub-umbilicate, yellowish brown, margin deflexed ; stem 

 rather slender, enlarged upwards into the rugose base of 

 the cup ; externally verrucose, fuliginous brown ; asci 



