146 4. CRUCIFER.E. 



that the latter name has included the two dubious species, 

 as far as British localities are concerned. And by reason 

 of the impossibility of my distinguishing to which of the 

 thiee the recorded localities of "B. vulgaris" do truly be- 

 long, I am compelled to treat their distribution in con- 

 nexion. When possessed of sufficient data, I prefer to 

 show the distribution of questionable species apart from 

 the more typical forms, to wliich they would be assigned 

 by the "lumper" in species-botany. 



97. Barbarea PRiECox, Br. 



Area (1 2 3 4 5 * * ^ 9 10 11 * 13 14). 



Alien. Having been long cultivated in gardens, this 

 species occurs, from time to time, as a half-wild straggler, 

 from the south coast of England, northwards to the Clyde 

 and Forth, or even beyond those rivers. In few parishes 

 has it acqiured any real settlement. Dr. Bromfield says 

 that it is abundant everywhere in the Isle of Wight. For 

 several years it was always to be found on wastes about 

 Thames Ditton; but the progress of enclosm-e and railway- 

 making has since nearly extirpated it here ; though it 

 is stiU allowed to gi'ow as a weed in one of my gardens, 

 which was enclosed from the waste some few years back, 

 and the weed then enclosed also — not sown or cultivated 

 otherwise. This is the som-ce of any specimens, labelled 

 "Thames Ditton," which I have distributed with dates 

 later than 1842. 



