12 -ACOTYLEDONS." — FUNGI. Trichia. 



1. F. ^ayfl, effuse and roundish yellow externally cellular and 

 fibrous. Peri. p. 161. Reticularia lutea, Soiv. t. 399. J, 2. 

 Mucor septicus, Light/, p. 1073. 



Hab. On grass and mosses occasionally. Aug. Ilupk. Mr. Greville. 



2. F. vaporaria, at first yellowish extending itself in a veiny 

 or reticulated manner, when mature forming broad and thick 

 massescellular and fibrous olivaceous. Pers.p. 161. Reticularia 

 liorttnsis, Sow. t. 399. f. 1. 



Hab. On the tan in hot-beds and stoves, abundant, Hopk. Mr. 

 Greville. 



The pest of plants in the tan-pit, running in one night's time up their 

 stem from the tan, and covering them with a slimy yellow matter, 

 which soon dries; when, under a thin crust, is seen a greyish or 

 olivaceous powder, which disseminates itself in all directions, 



12. DIDERMA. 



Petidium generally double; exl. fragile; i7it. pellucid, rather 

 distant from the outer one. Columella large, roundish. 

 Threads, or filaments, few, buried among the sporules. 



1. "D. glohosum, stemless smooth globoso-hemisphaerical white. 

 Pers.p. 167. Sturm's Fuvgi, t. 6. 



Hab. On dead beech leaves at Braid Hermitage, Edinb., Mr. Greville. 

 A minute but very pretty little fungus. 



2. D. vernicosum, stipitate collected together reddish brown 

 ovate shining, stipes short whitish. Pers. p. 165. Ohs. 

 My col. 1. p. 89. /. 3. f. 7. Leiocarpus vernicosus, Nees 

 von Esenleck, t.9 f.\ 10. Sphcerocarpusfragilis, Sow. t. 27J). 



Hab. Upon the stems of mosses aboiit Edinb. Autumn. Mr. Greville. 

 13. PHYSARUM. 



Peridium rigid simple, for the most part rugulose somewhat 

 farinaceous. Filaments scattered, united generally in a reti- 

 cidated manner amongst the sporules. 



1. P. nutans, stipitate greyish white, peridium lenticular gla- 

 brous rugulose drooping. Pers.p. 171. Trichia alia, Sow. 

 t. 259. 



Hab. On rotten sticks, on the peat in wet moors, frequently, Hopk. 



Peridium umbilicate beneath. Dust dark brown. Stipes somewhat 

 attenuated, brownish, 



14. TRICHIA, 

 Peridium at length bursting irregularly, persistent. Tuft of 



filaments compact, adhering to the base of the peridium within, 



and expanding elastically. 

 1. Tr. ovata, clustered sessile obovate opaque brownish yellow. 



Pers.p. ISO. Trichia turlnnatUj Sow. t. So. Lycoperdon 



epiphyllum. Light/, p. 1069. 

 Hab. Upon dead leaves, moss and rotten wood in the winter. Light/. 



Small, closely crowded. 



