224 Botany. 



L. decolorans, Flk. On the ground in hilly districts ; frequent, 

 Pauls Cray Common. Howse. 

 var. aporetica, Koerb. Abbey Wood, Hanbury. 



L. effusa, var. csesio-pruinosa, Mudd. Frequent on elder trees. 



L. melaena, Nyl. On roots of trees and chalky banks ; frequent, 

 Chelsfield, Shoreham. 



L. myrioearpa, DC. On old trees ; common. Northfleet ; Crofton 

 Woods. 



L. ostreata, HofTm. On old palings, rarely on trees ; frequent. 

 Keston Common. 



L. parasema, Ach., var. elaeochroma, Ach. On trees and old 

 palings. Bexley, Chelsfield. 



L. quernea, Dicks. On decomposing posts and palings and old 

 trees ; frequent. Bexley ; Chislehurst. 



L. rosella, Pers. On trees ; rare. On the root of an ash tree in 

 hedge near Chelsfield. 



L. rubella, Ehrh. On elm trees ; common. Chelsfield ; Lulling- 

 stone Park. 



L. spododes, Nyl. On old palings ; rare. Between Cuxton and 

 Cobham, sparingly. 



L. tricolor, With. On oak and birch trees ; rather common, 

 Joy den's Wood ; Swanscombe Wood ; Halstead. 



L. uliginosa, Schrad. On damp turfy earth in woods and on 

 commons ; frequent. Dartford Brent ; Joyden's Wood. 



Group 9. Graphidiei.1 



ARTHONIA pruinosa, Ach. On old trees ; not common. Lnlling- 

 stone Park, Cobham Park. 



GRAPHIS scripta, Ach. On coppice oaks, etc. ; frequent. 



OPEGRAPHA lyncea, Sm. On old oaks ; rare in Kent. Cobham 

 Park (very fine and abundant). 



0. varia, Pers., /. notha, Ach. On old trees. Near Eynsford 

 Viaduct ; Lullingstone Park. 



0. viridis, Pers. On old trees ; common in Kent. On trees near 

 Cobham Park ; farm, Orpington ; Eynsford. Frequent on 

 the thin easily separating bark of yew trees. 



STIGMATIDIUM crassum, Dub. On old trees ; common. Chisle- 

 hurst. 



Group 10. Pyrenocarpei. ' 



VERRUCARIA gemmata, Ach. On trees ; frequent. 



V. glaucina, Ach. On calcareous walls ; frequent. Abbey Wood. 



V. nigrescens, Pers. On walls, rocks, roots of trees ; frequent. 



