-^0 FUNGI. [Rhytisma. 



SiifFolk. D. Turner, Esq. Stibbington, Hunts, Rev. M. J. Berkeley. 

 Appearing at first like the old wrinkled shields of the Lichen on which 

 it is parasitic. — Fries is now of opinion that the crust on which the black 

 bodies are produced is not heterogeneous, and that, consequently, they 

 are true shields. He has, tlierefore, proposed for it the genus Cliosto- 

 mum, Fr. aS*. O. V. 1. p. 116. Lich. Eur. p. 455.— As this opinion 

 is founded on the notion that Lecidea Ehrartiana is merely the apothe- 

 cia of Lecidea varia uj)on a foreign crust, it is scarcely advisable at 

 present, in a local Flora, to make any alteration until such is generally 

 acknowledged to be a correct view. 1 have the same plant from Madeira. 



2. R. maximum^ Fr. {large Willow-branch Rhytisma) ; sub- 

 innate broad even, the circumference obtusely lobed, bursting 

 in minute fragments, furnished with a pure white stratum 

 beneath the disc. Fr. Si/st. Myc. v. 2. p. 566. Scler. Suec. ! 

 n. 250 — Sjjh. aurea, Soiv. ! t. 'dbQ.—Relh. Cant. ed. 3. ;?. 574. 



On Willow branches. Cambridgeshire. Rev. R. Rel/ian and Rev. 

 3Tr. Holmes — Forming bullate black patches on the young branches, 

 adnate with the epidermis, shining in the centre, dull towards the mar- 

 gin, which is lobed ; the lobes rounded, with or without a golden yel- 

 lovv border, especially remarkable in the Cambridgeshire specimens, in 

 which the patches are frequently confluent, extending for several inches, 

 so as to give the branches on which they grow a very beautiful chec- 

 quered appearance, like the skin of an adder. Substance inmiediately 

 below the epidermis subcinereous, then jet-black, beneath which again is 

 a pure white stratum from which the upper portion easily chips off. 



3. R. Andromedce, Pers. {Andronieda-leaf Rhytisma) ; innate 

 oblong costato-rugose shining, disc of a cinereous dingy-brown 

 hue. Fr, Syst. Myc. v. 2. p. 567. Scler. Suec! n. 133. 

 Corda in St. Deutsch. FL v. 3. t. 46. — Xyloma Andromedce, 

 Fers. Syn. p. 104. 3Ioiiy. §- Nest, f n. 176. Dec. Me?n. du 

 Mils. p. 320. t. 3./. 13. 



On living leaves o{ Andromeda polifolia. Mr. W. Wilson.— 'Re- 

 sembling pitch poured upon the leaves. 



4. R. salicinnm, Pi^rs. (IVilloiv-leaf Rhytisma) ; innate thick 

 tuberculate somewhat shining bursting in little scales, disc 

 slightly yellow, flesh white. Fr. Syst. Myc. v. 2. p. IjQS. 

 Scler. Svec. ! n. 134, 208. — Xyloma salicinum, Pers. ! Syn, 

 p. 103. Purt. V. 3. n. 1576. Grev. Fl. Ed, p. 368. Sc. Crypt, 

 Fl. t. 118. /. 2.— X leucochreas, Dec. I, c. /. 5. Moug. ^ Nest, 

 91, 175. 



On leaves of Willows. Very common, occurring even on the sum- 

 mits of the highest Scottish Alps, growing onSalixherbacea — The plant 

 it should seem, does not apy)ear with an open disc till the spring, when, 

 of course, the leaves are fallen and dead. In its early stage it is, as 

 Dr. Johnston remarks, altogether a Sclerotimn, but the perfect plant 

 is furnished Vvith asci which is altogether at variance with that genus. 

 It is in point of fact a case of analogy rather than of afiinity, a distinc- 

 tion which can scarcely be too constantly kept in view. On some 

 "willows it is surrounded by a yellow border. 



5. R, Acerinumy Fevs. (^Sycamore Rhytisma) i innate, spots 



