Sderotium.] rUNGl. 223 



Jan. Apethorpe, Norths., Rev. M. J. Berkeley. — Quite free, never 

 covered with the fibres of the matrix. Much reseinhiing the last, but 

 differing in being ahuost constantly de[)res.scd and unibilicated beneath ; 

 occasionally there is a dimple above, when it resembles Scl. scutellatam. 

 The epidermis is very thin, quite sniooth and even in the growing plant, 

 of a bright red-brown just before maturity, which viewed by transmitted 

 light is almost brick-red. 1 can find no described si)ecies according 

 with this. S. emergens appears to resemble it niost, but then this is 

 expressly described as never depressed or pc zizoid. The trees on which 

 it grew were lying under a north wall, so that there was a deficiency of 

 light, while the moisture was not readily dried up, and the blackened 

 surface retained all reflected heat, thus calling to mind the circumstances 

 under wiiich Agaricus volvaceus assumes th.e form of a Sclerotium.* 

 ( Sderotium Mijcetospora). 



5. S. fungorum, Pers. (irregular Sderotium) ; of no deter- 

 minate form lobed smootli pallid, at length tawny, dirty-white 

 within. Pers. Syn. p. 120. Fr. Syst. Mt/c. v. 2. p. 252. 



On the gills of blackened Agarics, often serving as a matrix to Ag. 

 tuberosus. Autunm ; conmion. — " At length deep-brown and blackish, 

 very various in form, sometimes subrotund, even or lacunose." Fr. I. c. 

 — /S. lacunosum; hard, lacunose, black, subterraneous. Pers. Syn. 

 p. 121. — Ag. racemosus, Sow. t. 287, was gathered hastily, and is there- 

 fore figured without its matrix, which is doubtless referrible to this 

 variety. Perhaps the Sderotium upon which Pcz. tuherosa grows, is, 

 as Sowerby supposes, the same species. Sd. suhterraneum, Tode, i. 1. 

 f. 5. e. appears also refierrible here. 



6. S. mnscorum, Pers. (oraugc Sderotium) ; of no deter- 

 minate form lobed smooth, tuberculated orange without and 

 within. Pers. Syn. p. 120. Fr. Syst. JSIyc. v. 2. p. 252. 

 Grev. FLF(I.p.4Ql. Sc. Crypt. Fl. t. 101— .S". subtcrrcmcum, 

 Tode, t.f, 5. a. b. 



On the decayed stems of mosses, principally confined to the lower 

 parts, and according to Greville, on the trunks of trees beneath the 

 surface of the soil when it is |)ale ami whitish within. Aut.— Spring. 

 Frequent in alpine and subalpinc districts. — I find the wiiole substance 

 com[)Osed of interlacing, almost reticulated filaments, without any ves- 

 tige of Sporidia. When dry, it is of a briidit saftion, the inner sub- 

 stance being o[)nquc, but this on being moistened loses its opacity. 

 Rhizoctonia muscorum, which in its dry state is scarcely distinguishable 

 fronj the present species, a[)pears to differ principally in the prcseticc of 

 more per.sistent mucedinous filaments. 



7. S. rdrimn, Pers. (vnri(d)le Sderotium); sn])rotiind or 

 oLlong varial)le in form snbadnate rugor^e white tlien brownish, 

 at lentrth black. Pers. Syn. p. 122. Nees, Syst. f. ^'3^'. Fr. 

 Syst. \Myr. v. 2. p. 258.' iMoug. .^' Nest. ! exs. v. SS\).—Fh'. 

 lirassivic, Ilofl'nt. Wg. (.'ry/>f. '2. t. b. f. 'I. — SiiIkci in Prasstctc, 

 Dids. ! Crypt. \. p.'ld.—Sd. JJuudy Purt. MSS. 



• 'i'lie Ktriictiiio of tilt- reccftiicle in llv'iicnnnn/cf/is ln'int «•( ifaiiily tilainrn- 

 touH, (<oiuivt«' IIi,i>/ii>,i.i/nt,s) ail a<lditioiial m j^uiiu'iit is 1h re ju tbciitcd in 

 favour of the view taken in the jireceding nute. 



