Sclerotium.] fungi. 225 



On decaying stems of herbaceous plants. Autumn — Spring. Ex- 

 tremely common Varying much in form. In var. /3. Hyacinthi 



(S. minutumy Desm.) on the capsules of the Harebell, there are no 

 striae, evidently from the peculiar situation, for, when it occurs on 

 the stem, I can see no difference. A species, apparently distinct, has 

 been gathered on the leaves of Iris Pseudacorus by Captain Car- 

 michael, subelliptic, irregular, 2 — 3 lines or more long, nearly 1 line 

 thick, not striate, but rugulose, as indeed is the plant on the Harebell 

 just mentioned, frecjuently abortive, and then shining and bordered by 

 a black line, portions of the matrix within the circumscribing line 

 being unoccujjied and pale. I do not propose it, as distinct, as 

 I have never gathered it. It is altogether different from Sclerotium 

 Iridis, Schweinitz. 



12. S. Pustula; D.C. (^oak-leaf Sclerotium) ; hypophyllous 

 hemispherical proniinerit rugulose at length black, within 

 horny white. Dec. I. c. f. 7. Fr. Sijst. 3Iijc. v. 2. p. 2G0. 

 — Scler. quercinimii Pers. Si/n. p. I "24. Ic, Pict. f. 18. f. 2. 

 Grev. Scot. Crijpt. Fl. t. 77. Fl. Ed. p. 4G2. Hook. Scot. 2. 



p. 10. 



On various leaves, but especially those of oak. Spring and summer ; 



not uncommon, particularly in Scotland Plant 1 — 2 lines broad, at 



first pale, occasionally two or more individuals become confluent. 



13. S. popubieumj Pers. (poplar-leaf Sclerotium); innate 

 subrotund or angular from several individuals becoming con- 

 fluent variable convexo-plane greyish-red at length black. Pers.! 

 Sijn. p. 125. 3Ioug. &> Nest. I cxs. n. SS5.— Scler. Suec. ! n. 139. 

 Grev. Fl. Ed. p. 4G3. Part. ! 3ISS.-^S. pojmlinum, Fr. Sysf. 

 Myc. V. 2. p. 262. 



On Aspen leaves; very" frequent Seldom so perfect as the spe- 

 cimens [)ublished by Fries. In Dr. Hooker's Herbarium, there are 

 specimens from Dr. Greville of an unnamed Sclerotium, on leaves of 

 Popiilus bcdsamifcra, which aj)proach very near to -S". arcolatum, 

 Fr. It is however probably nothing more than a form of the pre- 

 sent species, of a more gummy appearance from the peculiar nature 

 of the matrix. 



14. S. salicinu?n, D.C. (sallow-leaf Sclerotium) ; Dec. I. c. 

 f. 8. Moufj. S)- Aest. ! cxs] n. 386. Fr. Syst. Mt/c. v. 2. p. 



263. Scler. Sued n. 140. Grev. Fl. Ed. p. 462. Purt.! 



MSS. 



On sallow-leaves. Autumn and winter, common. — '' Rarely more 

 than half a line broad, but often covering a great part of the leaf, very 

 depressed, when young aj)pearing like a mere stain." drer. I. c. 



15. *S'. herhdrum, Fr. (herb Sclerotium) ; innate subrotund 

 or oblong confluent convex reddish-brown, then brown-bhn k. 

 Fr. Syst. Myc. v. 2. p. 263. Mouy. 6) Nest. ! n. i)*JO. 



Arlary, near Kinross, Dr. ( ^rrrdlc. —Vvics remarks that the forma 

 of this species are innunierable and that a species of (Wdo answers to 

 each. Dr. (Jnville's specimens are mixed with an l'rt:do, and in soir.o 

 cases the Credo bursts through liic centre of the Sclerotium. 



Q 



