JEcidium.] FUNGI. 373 



given the specific character from Link ; the upper surface of the spots is 

 however generally bright-red, with a yellow border. Dr. Greville's 

 section scarcely gives a correct idea of the pseudoperidiuni, which is, 

 1 believe, in all the species, certainly in this, more or less rounded 

 below. When the fruit is attacked, it is somewhat distorted and acquires 

 a peculiar disagreeable taste, and becomes ripe prematurely. Though 

 generally very common, I cannot find this year a single specimen on 

 the leaves. 



24-. JE. crussion, Pers. (Buckthorn yUcidiiwi) ; spots yellow- 

 brown not expanded, subiculum generally thickened, pseudo- 

 peridia crowded into a roundish heap at first globose yellow at 

 length open, sporidia orange. Pers. St/n. p. 208. Pers. Ic. 

 Sf Descr, A 10. /. 1, 2. iMouff. ^- Nest. ! n, 89,—^. Rhamni, 

 Purt. 3. n. 1538. 



On lihamnus catharticus. Very common. 



25. yp!. cornutum, Pers. {horji-like ^Pcidium) ; hypogenous, 

 pseudoperidia cylindrical elongated slightly curved yellowish- 

 browm springing from an orange thickened portion of the leaf, 

 sporidia greyish at length brown. Pers. ! Syji. p. 205. 3Ioug. 

 4- Nest.! n. 183. Sow. ^.319. Grev. PL Ed. p. 447. Sc. 



Cr. PL t. 180. Johnst. PL Benv. 2. p. 207 CcBoma cylin- 



drills, Lk. 2. p. 64. {in part). Kt. ! exs. n. 9G. 



On leaves of the Mountain- Ash. Not uncommon. 



26. jP. lacerdtum, Sow. (jagged jpcidium) ; hypogenous 

 on the petioles and fruit, pseudoperidia elongated agglomerated 

 brown splitting to the base in capillary segments, sporidia light- 

 brown. Sow. t. 318. Grev. PL Ed. p. 447. Sc. Cr. PL t. 209. 

 Johnst. PL Berxo. 2. p. 207. — .Pc. oxyacantha, Pers. ! Syn. p. 

 206. — JE. Crataigi, Purt. v. 3. p. 570. — Cccoma cylijidrites, Lk. 

 2. p. 64. (ill part). 



On the common Hawthorn. Not uncommon. Beautiful specimens 

 were sent by Mr. Purton on Mespilus grandijlora and Germunica, pro- 

 bably from Mr. Baxter. 



27. JE. cancelldtum, Pers. (Pear A^cidiuni) ; spots yellow 

 then red prominent, pseudoperidia split to the base into lacinia) 

 M'hich are united above. Ptrs.f in GmeL Linn. v. 2. p. 1472. 



Syn. p. 205. Sow. ^ 410. 3Iong. .")• NesL ! n. 184 Cicoma 



lioestilites, Lk. L c, KL ! ex. n. 97. 



On Pear leaves. Not common, !)ut in general iii)undant where it 

 occurs — The upper side of the spots is granulated with abortive pseudo- 

 peridia, as is the case also frequently in the two foregoing species. An 

 j-Kcidium, apparently of some interest, has been fouiul by Dr. (irevillc 

 on Pottrinm Sanf/uisorba, the specimens however in Dr. Hooker's 

 Herbarium are too young to describe. 



28. .E. Ornhi, Dec. (liittvr-vdch .Pridiuni) ; spots yellow 

 effused, pseudoperidia scattered and disposed in small heaps. 



