NORTHTJMBEHLAND AND DUEHAM. 123 



4. THLASPI, L. 



1. T. arvense, L. Colonist. British type. Area C, N, D. 



Eange 1. 



A rare weed of cultivated ground. Ord fields and other 

 places near Berwick (Johnston). Field a short distance north 

 of "Wooler (James Hardy). Dunstan Square and between Les- 

 bury and "Warkworth (R. Embleton). Heaton Dene and fields 

 near Gateshead (F !). 



2. T. alpestre, L. Native. Intermediate type. Area N, D. 



Range 1-3. 



This species shows a curious preference for lead-mines, and has 

 a wide vertical range in the lead-districts. There are two varie- 

 ties, of which T. sylvestre, Jordan, grows near the Allen at 

 Thomhaugh (G. S. Brady !) ; plentifully with Cochlear ia about 

 the Langlee mines not far distant from the first station ; by the 

 Tyne in various places from Featherstone Castle as low down as 

 Bywell ; and in the wood on the north side of the Tees at Winch 

 Bridge (B.) ; and T. occitanum, Jord., in "Weardale, on the north 

 side of the stream below Eastgate, where it was first noticed by 

 !Mr. T. J. Foggitt (250 yards) ; and about the Grasshill mines on 

 Highfield, ascending to 750 yards (B.). 



5. CAPSELLA, Vent. 



1. C. bursa-pasfortSf D. C. Native. British type. Area C, 

 N, D. Range 1, 2. 



Everywhere common in cultivated fields and waste ground, 

 ascending to 1200 feet in Teesdale, 1340 feet on Rookhope Moor, 

 1500 feet on Kilhope, and 1530 feet above Allenheads. 



5. TEESDALIA, R. Br. 



1. T. nudicaulis, R. Br. Native. English type. Area C, N. 

 Range 1, 2. 



Not unfrequent about "Wooler amongst the porphyritic debris. 

 Tevering Boll (nearly 400 yards), Maiden Well, Hellpath near 



