Dematium.] 



FUNGI. 337 



6. H. simplex, Kunze, (simple BelmiiUhosporium) ; fibres 

 aggregate simple or slightly branched obtuse black, sporidia 

 fusiform acute pellucid, septa evanescent. Nees, I. c. p. 2^:\, 



/. 1 1. LL Sp. 1. p. 4, Corda, I c. t. 13. Fr. Syst. Myc. v. 3. 

 p. 359. 



On rotten branches. Rockingham Forest, Norths. Jlev. M. J. 



Berkeley Forming a thin, dirty, uniform stratum like that of some 



Torula ; septa 2 — 3. Nees however describes his plant as having 

 oblongo-clavate sporidia, with 3 — 5 septa, tliough he does not so 

 figure it. 



*** Primary fibres changed into sporidia, which in consequence 

 are sessile. 



7. H. Tilice, Fr. {Linden Helminthosporium) ; fibres simple 

 obtuse obscurely annulated brown-black fasciculate on a convex 

 erumpent stroma, the greater part changed into sporidia. Fr. 

 Syst. Myc. V. 3. p. 360. — Exosporiuni Tilice, Lk. Sp. 2. p. 121. 



Fr. ! Scler. Suec. ?i. 178. Grev. Sc. Crypt. Fl. t. 208 Sphoeria 



echinata. Sow. ! Herb. 



On fallen branches of lime trees. Very common. 



119. Dematilm. Ptrs. Dematium. 



Sporidia simple, free, disposed in rows or conglomerated 

 upon the straight fibres. — Name, o-iiaiiw, a bundle. 



1. D. griseum, Pers. {grey Dematiiwi) ; fibres aggregate 

 brown-black quite simple above, sporidia oblongo-cylindric grey 

 conglomerated just above tlie base upon very short branchlets. 

 Pers. Myc. Eur. \.j). 15. Fr. Syst. Myc. v. 3. p. 364. — Chce- 

 topsis Wauchii, Grev. Sc. Grypt. FL t. 236. — CIdoridium griseum^ 

 Lk. Sp. \. p. 38. Grev. Syn. Gen. et. Sp. p. 6. 



On rotten hase! stumps, generally in the neighbourhood of Splucria 

 fusca. Edinburgli. Captain Wauch. Fineshade, Norths. Ilev. M. 

 J. Bcrkeh'ii. — This curious fungus may he easily recognised by the 

 greyi^sh, cylindrical masses oi sporidia, iw-^X. above the base of the threatls. 

 The sporidia 1 find of a very ditfercnt form from that represented by 

 Dr. (ireville, but as he calls them in his Synopsis oblongo-cylindric, 

 and it is notorious that sporidia often accpiire a more elongated form 

 in an advanced stage of growth, I see no reason, without the examina- 

 tion of authentic specimens, to suppose my plant, in which they are six 

 times as long as broad and very slightly but ilcciiledly curveil with a 

 round pellucid globule in tiie centre, really distinct. I find however 

 the branchlets very obscure, if not altogether wanting, and I suspect 

 from the account given by Fries, who has evidently drawn up his 

 character after the figure in the Scottish (!ryptogamic Flora, and the 

 absence of all mention of them in Link's description, that in general 

 they are not so nuich developed as in Dr. (ircville's plant. Two other 

 minute ditierences may also be noticed, that in my specimens the fibres 

 are not bulbous at the base, and that several fibres freciuently pa-ss 

 through the same iicap of sporidia. I do not doubt that my plant is 



z 



