108 COMPOSITE. 



465. C. arvensis, Curt. Creeping Thistle. 



Native; in cultivated fields and waste places. Very 

 common and generally distributed. A most troublesome 

 weed. Vn. VIII. 



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. Patch way. Yate Common. Alveston. 

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

 combe. Wells. Yatton. VI. VHI. 



468. C. acaulis, L. 



Native ; in dry limestone pastures, rather common on the 

 Downs near Bristol. 



C. dubius, Willd., and C. Gibsoni, are caulescent states of 

 this plant ; sometimes found in similar situations. See 

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

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



SILYBUM, Gaert. 



469. S. Marianum, Gaert. 



Alien ; in 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 common. 



VII. VIII. 



