NORTnUMBEKLAND AND DURHAM. 199 



21. BIDENS, L. 



1. B. cernua, L. Native. English type. Area N, D. 



Range 1. 



Ditches, rare. In Tyneland at Prestwick Carr, and gathered 

 by John Thompson near Crowhall Mill. In Durham at IS'orton 

 (Miss Y,Tiarton), and near Birtley and Chester-le- Street (F.). 



2. B. tripartita, L. Native. English type. Area C, N, D. 



Eange 1. 



In similar places to the preceding, more frequent. Chatton, 

 Harnham, Corbridge, Prestwick Carr, Lamesley, Chester -le- 

 Street, Durham, Bradbury, Morden Carr, &c. 



22. EUPATORIUM, L. 



1. E. cannahinum, L. Native. British type. Area C, N, D. 

 Range 1. 



Frequent in ditches and swamps and by river-sides in the low 

 country, ascending to 200 yards in Teesdale. 



23. TANACETUM, L. 



1. T. vulgare, L. Native. British type. Area C, N, D. 

 Range 1. 



Frequent in the low country by stream-sides and in waste 

 ground. 



24. ARTEMISIA, L. 



1. A. maritima, L. Native. Maritime. English type. 



Area C, N, D. Range 1. 



Frequent along the coast-line in the salt marshes and by the 

 stream-sides, both the type and var. gaUica. 



2. A. alsinthium, L. Denizen. English type. Area C, N, 



D. Range 1, 2. 



One of the commonest ballast plants, and occurring occasionally 

 inland near villages and farm-houses. Seen in Teesdale at 400 

 yards. 



