THE CRYPTOGAjMIC FLORA OF KENT. 335 



Fl. Tiinhr. Near Enstliall Common ; Boxley, near Maid- 

 stone ; and Chilstone Park, near Lenliam, sparingly. In 

 fruit in Pensliurst Park, on horse-chestnut trees, in June, 

 1875 ; in fruit abundantly in Broome Park, near Siberts- 

 wold. 

 Known by its dark grey-green colour, cup-shaped segments, 

 and wrinkled thallus. 



P. SAXATILIS {L.). 



On rocks and trees; frequent. E. B. t. 603. 

 In fruit on trees in Broome Park. 

 Var. sulcata, Tayl. On trees, Penshurst. 

 YsiY.furfiiracea. On palings. Hill Park, Westerham. 

 A very variable species, known from P. lan'igatahy the medulla 

 of the thallus turning red when touched with solution of caustic 

 potash. The var. furfuracea resembles P. aleurites, from which the 

 same test distinguishes it. 



P. ALEURITES, Ach. 



On posts and palings in damp places ; rare in Kent. E. B. t. 858. 

 On wooden rails, near a pond in Penshurst Park ; barren. 

 This plant, according to the Rev. J. M. Crombie, is more nearly 

 allied to Platysma. 



Physcl^ FLA^^CANS {Sw.}. Parmelia (E. B.). 



On trees ; more rarely on rocks near the sea. Rare in Kent ; 



not observed with apothecia. E. B. t. 2113. 

 Beechborough Park, sparingly ; extremely fine and abundant 

 in one spot on Lydd Beach. 



P. PARiETiNA (I/.). Parmelia (E. B.). 



On walls and trees, common. E. B. t. 194. 

 Sidcup ; Chelsfield ; Wrotham ; Brastead ; Sevenoaks ; Pens- 

 hurst; Wye. 

 Var. lychnea, Ach. Chelsfield; Lullingstone Park, near Shore- 

 ham ; Maidstone ; abundantly on walls at Wrotham. 

 The var. lychnea much resembles Lecanora candelaria. The 

 latter, however, does not turn red when touched with solution of 

 caustic potash. 



P. cn^LUEiis {L.). Parmelia (E. B.). 



On trees, frequent, especially in parks and by road- sides. 

 Boxley Hill, near Maidstone ; Edenbridge ; Postling ; Wrotham ; 

 in fructification near Moldash, and Brastead, and in Pens- 

 hurst Park and Broome Park. 

 Var. actinota, Ach. E. B. 1352. Hythe. 



P. PULVERULENTA [Scliveh.). 



On trees, common. 



Beechborough; Postling; Wye; Boxley; Edenbridge; Wrotham. 



Var. i^%rm (Ach.). E. B. 2064. Parmelia (F^.B.). On trees 



on Tunbridge Wells Common ; Jenner FL Timhr. Rochester, 



Hoivse! Lullingstone Park; Beechborough Park; Challock 



Wood, near Wye ; Chelsfield ; Boxley. 



Var. venusta, Ach. Near Tunbridge Wells Common. 



