222 Botany. 



PARMELIA Borreri, Turn. On trees ; frequent. Bexley. 



P. caperata, Ach. On trees and palings ; very common. Bexley, 

 Swanscombe Wood. 



P. Isevigata, Ach. On trees (especially firs), rocks and 

 frequent. High Elms near Chelsfield. 



P. olivacea, L. On trees and palings ; one of the commonest lichens, 

 and one of the few within reach of London smoke. Abbey 

 Wood ; Sidcup. 



P. perlata, Ach. On trees, rocks, and walls ; common. Bexley. 

 P. physodes, Ach. Common on old palings, fir trees, etc. Abbey 

 Wood. 



P. tiliacea, Ach. On trees, especially those with a smooth bark. 

 Eynsford. 



Group 6. Stictei. 



PELTIGERA canina, HofTm. On hedgebanks and among moss in 

 woods ; com. Abbey Wood, Hayes Common, Bexley, etc. 



P. polydactyla, Hoffm. On damp mossy banks in hilly districts. 

 Halstead ; Ide Hill. 



Group 7. Physciel. 



PHYSCIA caesia, Nyl. On trees. Cobham. 



P. eiliaris, DC. On trees ; frequent, especially in parks and road- 



sides. 



P. lychnea, Nyl. On walls and trees. Chelsfield, Lullingstone Park. 

 P. obscura, Ehrh. Common on elm trees, etc. 



var. virella, Ach. Bexley, Shoreham, Chelsfield. 



var. adglutinata, Flk. Lullingstone Park. 

 P. parietina, L. On walls and trees ; common. 



P. pulverulenta, Nyl. On trees ; common. 



sub-sp. pityrea, Nyl. Lullingstone Park ; Chelsfield. 



P. stellaris, Nyl., sub-sp. tenella, Nyl. On trees and bushes ; 

 very common. Sidcup, Chelsfield. 



Group 8. Lecanorei. 



PLACODIUM callopismum, Mudd. On walls and rocks ; less fre- 



quent than murorum. Bexley. 

 P. decipiens, Leight. On old walls ; frequent in Kent. Abundant 



on walls of Eynsford Castle ; Shoreham. 



P. murorum, Leight. On walls, rocks, etc. ; common. Bexley, etc. 

 GANDELARIA laciniosa, Nvl. Rare. Shoreham. 



