320 COMPOSITAE 



LACTUCA, Linn. Gen. n. 814 (Tournefort, Inst. t. 267). 

 Ii. virosa, Linn. Sp. PI. 795 (1753), and of Parkinson. Wild Lettuce. 

 Top. Bot. 225. Syme, E. B. v. 145, t. 805. Nyman, 435. Fl. Oxf. 178. 

 Native. ViaticaL Hedges, waysides, and bushy places. Local. A. 



or B. July-September. 

 First recorded by Mr. Baxter in Walker's Flora, 1833. 



1. Isis. By the side of the new road going from Botley to Eyn- 



sham, about 200 or 300 yards before you come to the bridge, 



July 30, 1 83 1, Baxter, 1. c. It appears to be now extinct in that 



station. 



3. Pang. Rather plentiful in one locality between Pangbourn and 



Goring. 

 .'•. Loddon. Given in Flower's Beading List. Shinfield, Tufnail. 

 Maidenhead, Hurst, MS. in New Bot. Guide. Near Billingbear 

 Park, Penny. Between Bray and Holyport. Near Arborfield. 

 Near Hurst. By the railway at Twyford, fine specimens. 

 Abundant by the railway near Cookham, Bourne End, and 

 Maidenhead. 

 Tlie form iniegrifoUa (var. integrifoUa, S. F. Gray, Nat. Arr. ii. 417) 

 sometimes occurs. 



L. virosa is found in all the bordering counties, but it is scarcely 

 native in Wiltshire. It is plentiful in gravel-pits near Taplow 

 Station in Buckinghamshire. 



[ Ii. ScARioLA, Linn. Sp. PI. ed. 2, 1119 (1762). Syme, E. B. v. 148, t. 806. It 

 is recorded for Surrey.] 



li.muralis, Meyer, Chlor. Hann. 431 (1836). Fresen. Taschenb. (1832) 

 484. Ivy-leaved Wall Lettuce, Wall Ivy-leaf. 



Sonchus laevis muralis, Ger. Em. 293. Prenanthes muralis, Linn. Sp. 

 PI. 797. 

 Top. Bot. 226. Syme, E. B. v. 150, t. 808. Nyman, 435. Fl. Oxf. 178. 



Native. Rupestral and sylvestral. Stony woods, walls, dry hedge- 

 banks on calcareous soil, for which it shows a decided preference. 

 Locally common, but absent from considerable areas. A. or B. 

 June-October. 



First record. Prenanthes muralis, Dr. Noehden, in Mavor's Agr. Berks, 

 1809. 



1. Isis. Wytham. 



2. Ock. On old pollard willows in Bagley Wood, Baxter, 183 1. 



Besilsleigh. 



3. Pang. Streatley, PampHn. Unwell Wood. Tilehurst. Near 



Reading. Basildon. Bradfield. Pangbourn. With copper- 

 coloured leaves at Streatley. Englefield. Yattendon. Buckle- 

 bury. 



