134 CRYPTOGAMIA-FUNGI. 



Fl. t. 52. Fl Edin. 366. Peziza comitialis, Sow. Fung. t. 118. 

 Xylvnia pezizoides, PERS. Syn. 105. 



//5. On dead beech (and oak) leaves, in woods. 



The above description is taken from the plant in a dried 

 state, and on beech leaves, on which, according to PER- 

 SOON, it is less perfect than when on the oak, and seldomer 

 open. In this latter state it is a fungus of considerable 

 beauty, and has been aptly compared to a coronet in mi- 

 niature. The apex splits into a number of acute triangu- 

 lar segments, which become elevated and slightly bent 

 back, so as to expose the disk, which is of a pale yellow or 

 yellowish-green colour. 



2. P. repandum, black, minute, roundish, prominent, the disk 

 concave, black, with a waved or irregularly-divided margin. 

 SPRENG. Syst. Veg. iv. 41 1. Xyloma herbarum, DECAND. Fl. Franc. 

 vi. 161. 



Hab. On the leaves and steins of the blue sherardia, in 

 June, rare. 



Like a minute tubercle on the leaves, each distinct and ge- 

 nerally remote. When pressed between two plates of 

 glass, and examined by the microscope, it appears to be 

 entirely composed of erect straight pellucid filaments, 

 which are presumed to be organs containing the proper 

 seeds. 



3. P. Vaccinii, glossy black, minute, round, convex, dimpled 

 when close, opening with 4 segments, the disk smoky-black. 

 SPRENG. Syst. Veg. iv. 411. 



Hab. On decayed leaves of Vaccinium Myrtlllus. 



69. 11HYTISMA. 



OBS It cannot have escaped the observation of any one, that 

 the leaves of the plane or sycamore become, in the autumn, mark- 

 ed with large circular spots of a black colour. These spots afford 

 the most characteristic example of this genus. There are various 

 other species which all infest leaves previous to their fall, but 

 scarcely until they have shown some symptoms of decay. rf 



1. R. salicinum, black, rugose, thick, forming a large irregular 



