338 FUNGI. [Cladospormm* 



the same as Link's, but it is possible that Dr. Greville's is distinct, 

 and if this should be the case it would bear the name of Dematium 

 Waucliii. 



2. D. hispiduhcm, Fr. (hispid DematiU7)i) ; fibres fasciculate 

 simple black, sporidia globose of the same colour opaque con- 

 glomerated towards the base of the fibres. Fr. St/st. Myc. 

 V. 3. /). 366. — Conoplea hispidula, Pers. St/n, p, 235. Fr, ! 

 Scler. Saec. 7i. 380. Lh. Sp. 1. p. 46. 



On dry leaves and stems of grasses. Scotland. Dr. Greville in 

 UooJi. Herb., whose specimens accord precise!}' v.ith those of Fries, 

 who informs us that he has seen the sporidia collected above the base 

 of the filaments as in the last species. An acute eye is requisite to 

 distinguish this from several fungi of a similar habit that occur on grasses. 



120. PoLYTHRfNCiUM. Kiuize. Polythrincium. 

 Sporidia free, unlseptate, at length scattered upon the moni- 

 Wlovm Jlocci. — Name, cro?.-j;, many, and Soiy/.o;, ^partition. 



1. P. Trifolii, Kunze, (common PoJythrinciwii) — Kimze, 

 Ilyc. Heft. \.t.l. f.Q. Grev. Sc. Crypi. Ft. ^.216. Lk. Sp. 

 I. p. 43. 3Ioug. S> Nest. ! n. 688. Baxt. I Ox. n. 84. Covda, L c. 

 t. 9 Farinaria Trifolii, Sow.! t. 396./: 7. 



On the fading leaves of several species of Trifoiium. Common. — 

 Often associated with Sph. Trifolii and Ascobolus Trifolii. Forming 

 little black sooty dots on the leaves. 



121. Cladosporium. Lli. Cladosporium. 



Sporidia arranged in sliort, moniiiform branclilets, at lengtli 



falling off. Flocci septate above Name? zXadog, a hraiich, and 



c~c^o;, seed. 



1. C. herhdrum, Lk. (common Cladosporiimi) ; tufts effuse 

 soft dense green then olive-black, fibres collapsing pellucid as 

 well as the olivaceous snoridia. Lk. Sp. \. p. 39. I^ees, Syst. 

 f. 64. B. Grev. Fl. Ed. p. 469. Johnst. Fl. Berw. 2. p. 209. 

 Fr. Syst. 3Iyc. v. 3. p, 370. — Dematium herbarum, Pers. Syn. 

 ]j. 699.— Z>. articidatum, Sow. ! t. 400./. 8. 



On all sorts of decaying substances, damp paint, fungi, &c. Every 

 vvhere. — This is perhaps the most common of all Fungi, growing on all 

 decaying substances and in consequence assuming various forms. There 

 is however no difficulty in recognising it. Clad, velutimtm, Grev., 

 appears to have no characters to distinguish it, unless a multitude of 

 species be formed. It is often quite black when old. Clad. Fianago, 

 Lh. and Fr. I scarcely think distinct. I have little doubt that in most 

 cases it originates on leaves more or less sprinkled with honey-dew 

 fi'om the presence of Ap/iidei, and as there is frequently a repeated 

 deposit of nutritive matter, the plant acquires a peculiar grumons appear- 

 ance. I have lately, on a plum-tree which is completely smothered by 

 it, found some leaves in which the parasite has contrived to emerge 

 completely from its disguise and appear in its own form, INIr. Lowe 

 informs me that the orange trees in Madeira are dreadfully infested 

 with either this or a similar production. 



