M. C. COOKE ON NETTLE STEMS AND THEIR MICRO-FUNGI. 81 



yellow and minute ; the sporidia fusiform, and delicately unisep- 

 tate. It has not hitherto been met with in Britain. 



This enumeration inchides the majority of the species of micro- 

 fungi which have as yet been detected on the stems of old nettles 

 in Britain. Formidable as the list may appear, there are two or 

 three others which have been found on the Continent, and which, 

 by dint of perseverance, may still be found in this country. At 

 any rate, we have made good the assertion with which we com- 

 menced, that the nettle has a complete host of enemies, blighting 

 it whilst living, and preying npon it in decay. In illustration 

 of the enemies which are parasitic upon it whilst living, we have 

 been unable to devote space equal to that already occupied, leaving 

 out of the calculation all the insect enemies for the entomologist 

 to discuss ; but the moulds, cluster-cups, Septoria^ and other para- 

 sites of living nettles, are scarcely less numerous than those which 

 flourish on its decay. 



The following is a list of the species of micro-fungi alluded to 

 in this communication : — 



Acrospermum compressum. Tode. 

 Dinemasporium var. herbarum. 

 Toriila herbarum. Link. 

 Septonema elc«igatispora. Preuss. 

 Dendryphium comosum. Wo2l. 

 Dendryphium curtum. B. S; Br. 

 Dendryphium griseum. B. ^ Br. 

 Arthrobotryum atrum. B. <^ Br. 

 Acrothecium simplex. BerJc. 

 Peziza fusarioides. BerTc. 

 Peziza viliosa. Pers. 

 Peziza plano-umbilicata. Grev. 

 Peziza sulphurea. Pers. 

 Peziza inflexa. Bolt. 

 Peziza coronata. Bull. 

 Peziza campanula. Nees. 

 Peziza striata. Fr. 

 Helotium herbarum. Fr. 

 Sphasria acuta. Hoffm. 

 Sphaeria urticae. Rahh. 

 Sph^eria ulnaspora. Cooke. ' 

 Sphjeria rubella. Pers. 

 Sphaeria doliolum. Pers. 

 Sphseria superflua. Awd. 

 Lophiostoma sex-nucleata. Cooke. 

 Lophiostoma caulium. Fr. 

 Nectria dacrymycella. Ngl. 



JoURN. Q. M. 0. No. 20. G 



