FLORA OF NOVA SCOTIA — LAWSON. 95 



form which certainly looks like a true native plant, and there 

 appears to be no doubt of its Ijeing indigenous on the north-west 

 coast, while it has been regarded by some as also indigenous in 

 the Southern States ; but in Gray's Manual it is treated, as re- 

 gards the Northern States, simply as an escape from cultivation. 



Nasturtium Armoracia, Fries. Horse Radish. Rubbish 

 heaps about Halifax city and other towns and villages, a garden 

 outcast. 



Nasturtium palustre, DC. On ballast heaps at Pictou, and 

 at North Sydney, Cape Breton, apparently introduced, Macoun's 

 Catalogue. 



Barbarea vulgaris, R. Br. St. Barbara's Herb. Formerly 

 abundant ab(jut Four Mile House (about Hotel St. Elmo), the 

 village now known as Rockingham, on the western shore of 

 Bedford Basin. Pictou, A. H. Mackay. 



This plant is regarded as truly, indigenous in the region to the 

 north and west of Lake Superior ; whether it is so in N(^va 

 Scotia is doubtful. 



Hesperis matron alis, Linv. Dame's Violet. Grows in old 

 gardens, and persistent. Pulsifer's and Lucylield, Sackville, 

 Halifax County. 



Sisymbrium officinale. Scop. Hedge Mustard of England. 

 Abundant in Dalhousie College grounds, Halifax. Pictou, A. H. 

 Mackay. 



Brassica Sinapis, Visi'ini. B. Sinapistrum. Boissier, 

 Wats., Gr. Man. Cadlock. Wild Mustard. In grain fields, 

 a European weed, Cornwallis. Truro, very abundant in grain 

 fields, introduced, Dr. G. C. Campbell. 



Brassica nigra, Koch. Black, or True Mustard. Halifax, 

 Dr. Lindsay. Parrsborough, Cumberland, Dr. How^ (There is 

 possibility of error in determining the species.) 



Brassica alba, Boissier. In grain fields, sparingly, from 

 foreign seed, but not permanent. Lucyfield, Halifax County. 



