352 FUNGI. [Psiloma. 



a sulphur-yellow, in which case it appears to be the plant referred by 

 Captain Carmichael to F. siilphureuin, Lk, 



4. F. griseum, Fr. {grey Fusisporhim) ; spot-like, flocci very- 

 delicate evanescent, sporidia fusiform straight greyish-white. 

 Fr. Svsf. Myr. v. 3. p. 447. — Fusidium griseum, Lk. 2. p. 96. 

 Ditm. I. c. t. 17. Grev. Fl. Ed. p. 464. Sc. Crypt. FL t. 102. 



On fallen leaves. Extremely common. 



5. F. Buxi, Fr. {Box ■ leaf Fusisporiutn) ; heaps small scattered 

 rose-coloured at first surrounded by erect flocci, sporidia fusi- 

 form extremely minute becoming paler by age. Fr. Syst. Myc. 



V. 3. p. 447 Tubercularia Buxi {young plant). Dec. Fl. Fr, 



6. p. 110. — Fusidium Buxi, {old plant). Lk. Sp. 2. p. 97. 



On dry Box-leaves. Stibbington, Hunts. Rev. 3L J. Berkeley. — 

 I have found this plant in the young state only, in which it is a beautiful, 

 though minute object, and depend therefore entirely on Fries for his 

 correctness, as to the change which takes place in the .sporiW?^, with 

 more advanced growth. 



137. Epochnium. Lk. Epochnium. 

 Sporidia heaped together, springing from the matrix and 

 adnate M'ith it, oblong, apiculate, septate. Flocci of the my- 

 celiwn effused, intricate, mucedinous ; distinct sporidiferous 

 flocci none. — Name, st/, tipon, and oyyj'rici, a wild ])ear tree. 



1. F.ftmgorum, Fr. (black-green EpocJmium) ; flocci eff^used 

 very delicate, sporidia pellucid dark-green. Fr. Syst. Myc. v. 3. 

 p, 449. — Sporidermium atrum, Grev. Sc. Crypt. Fl. t. 194. — 

 Sporidesmium atrum^ Desm. ! exs. n. 708. 



On ThelephorcB. Very common Forming a thin black-green stratum, 



which overruns various Thelephora. Mycelium pellucid, black accord- 

 ing to Fries, branched, the apices of the short lateral branchlets swell- 

 ing into sporidia, which are at first uniseptate then biseptate ; they 

 appear then to fall off and are oblong and subcylindric, obtuse at either 

 extremity, at length a pedicelliform apiculus is formed, and the septa 

 are 3 — 5. The plant of Dr. Greville is certainly the same as what I 

 have in view, as I have ascertained by an authentic specimen from 

 Captain Carmichael, who referred it to Sporidesmiwn, and I conceive 

 by so doing misled Dr. Greville, who figured the specimens with Link's 

 analysis unconsciously impressed upon him. Specimens sent by Dr. 

 Greville to Fries, equally receded from the true Sporidesmium. 1 am 

 not at all convinced that the plant is rightly referred by Fries to the 

 present genus, for the same reason that Arthrinium is excluded ; but as 

 I am not acquainted with the other species I have given the generic 

 character exactly after Fries, and leave the matter for future investiga- 

 tion. The sporidia resemble much those of Corynea. It is to be 

 observed that the early structure of the plant can only be seen towards 

 the extreme edge of the patches. 



138. PsiLoNiA. Fr. Psilonia. 

 Sporidia simple, pellucid, not glued together, at first covered 



