108 COMPOSITE. 



465. C, arvensis, Curt. Creephig Thistle. 



Native ; iu cultivated fields and waste places. Very 

 commou and generally distributed. A most troublesome 



weed. vn. vin. 



466. C. palustris, L. Marsh Thistle. 



Native ; in meadows and marshes ; sometimes also on 

 high, dry ground. Very common. VII VIII. 



467. C. pratensis, Huds. 



Native ; only in peaty meadows, locally plentiful. 

 G. Filton Meads. Patchway. Yate Common. Alveston, 

 S. Fields near the reservoirs at Barrow Gurney. Wins- 

 combe. Wells. Yatton. VI. — VIU. 



468. C. acaulis, L. 



Native ; in dry limestone pastures, rather common on the 

 Downs near Bristol. 



C dnbkis, Willd., and C. Gihsoni, are caulescent states of 

 this plant ; sometimes found in similar situations. See 

 Sivete, Fl. 46. These may in some cases be hybrids 

 between this species and C. arvensis. VII. — IX. 



SILYBUM, Gaert. 



469. S. Marianum, Gaert. 



Alien ; iu waste ground, and dry pastures, rare. 



G. Horfield. Mr. W. E. Green. Some magnificent 



plants on a seabank by the Channel, between New 



Passage and Avonmouth, 1880. 

 S. Permanent on Brean Down. Banks of the Axe ; 



Mr. T. F. Perkins. Yatton ; Miss Winter. VI. VII. 



LAPSANA, L. 



470. L. communis, L. 



Native ; in cultivated and waste ground. Very commou. 



VII. vni. 



