Botany. 221 



Class II LICHENACEI. 



Group 1. Caliciei. 



CONIOCYBE furfuracea, Ach. On tree-roots and sandy ground ; 



rare. In the sand-caves at Chislehurst. Howse. 

 TRACHYLIA tympanella, Fr. On old posts and palings ; common. 



Group 2. Baeomyceaei. 

 B/EOMYCES roseus, Pers. On bare spots among heath ; frequent. 



B, rufus, DC. On exposed clayey banks in woods and on damp 



roadsides ; frequent. 



CLADONIA degenerans, Flk., var. amoena, Ach. Woolwich^Heath, 

 Sir J. E. Smith. 



C. delicata, Flk. On roots of trees or decayed stumps in woods, 



frequent. Stone Wood near Greenhithe ; on an old'railing 

 near Chelsfield. 



C. flmbriata, Fr. Greenhithe. 



C. macilenta, Hoffm. On turfy heaths ; frequent. Abbey Wood. 



C. pyxidata, Fr. Common everywhere. Abbey Wood, Sydenham, etc. 



CLADINA rangiferina, Hoffm. Common in heathy places. Ex- 

 ceedingly / abundant and very fine on Keston Common 

 among the heath. Blackheath and near Woolwich (Dil- 

 lenius in Ray, Syn., 1724), Keston Common (Fl. Met., 1836), 

 Chislehurst Common. 



Group 3. Ramalinei. 



RAMALINA calicaris, Hoffm., var. canaliculata, Fr. Frequent 

 on trees in parks. 



R. everioides, Nyl. Frequent on palings and trees in parks. 



R. farinacea, Ach. On tree? ; frequent. Bexley, Croft on Woods. 



R. fastigiata, Ach. On trees and bushes ; common. Crofton 

 Woods, Chelsfield. 



R. fraxinea, Ach. On trees, common. Crofton Woods. 



Group 4. LJsnei. 



USNEA barbata, Fr., var. rubiginea, Ach. On trees in damp 

 places ; frequent ; the commonest form in this country. 



Group 5. Parmeliel. 



EVERNIA prunastri, Ach. On trees and palings ; common. Abbey 

 Wood ; one of the few foliaceous lichens that approach 

 within ten miles of London. 



