62 THE FLORA OF HALIFAX. 



1775. In a lane leading from Hoin's Dye-house towards 

 Illingworth in Ovenden Wood. Nowhere else. — /. B. 



1805. Between Halifax and Blackstone Edge. — Rev. W. 

 Wood, Botanist's Guide. 



1832. Near Dean Head, Barkisland. — Herb. S. K. 



Fields in Ovenden Wood. The same station as mentioned 



in Watson's History of Halifax (1775). — Herb. Ley land. 

 Rare, by stream sides, and in woods and pastures : Cragg 



Vale ; and in the Colden Valley, both near Mytholm and 



higher up at Strines Farm. 



[Cnicus acaulis, Willd. See Carlina vulgaris.'] 



Cnicus arvensis, Hoffm. — 112. Thistle. 



Native. British type. P. June — August. 

 1867. Meadows near the Peat pits, Ogden. — /. Walker. 

 Common in fields and waste places. 



Var. setosus, Bess. Alien. 



1887—9. West Vale Station. 

 1896. On corn-mill refuse, Elland. 



Centaurea nigra, L. — ni. Hard-heads, Knapweed. 

 Native. British type. P. June — August. 



1867. Shibden. — J. Walker. 



Very common in meadows and pastures. 



[Centaurea Scabiosa, L. — 82. Great Knapweed. 

 Native. British type. P. July — September. 



1775. Only in a field belonging to Hand Green Farm, 

 near Causey Head in Warley. — /. Bolton. 



1836. Hangingroyd Mill, Hebden Bridge. — Herb. Gibson. 



No record since, and now perhaps extinct in a district 

 never favourable for its maintenance.] 



Centaurea Cyanus, L, — 95. Corn-flower. Bluebottle. 

 Colonist. British type. A. July — August. 

 1844. Luddenden Brook dam-stones. — S. King. 

 1867. Upper Shibden, and in Old Lane. — J. W. 



Infrequent, and usually as a casual on waste ground rather 

 than in cornfields; Sterne Mill; canal bank, Copley; 

 Skircoat Road, Halifax ; Lightcliffe. 



