4. CRUCIFER.E.- 167 



t /T^- ^//,^.J^y 124, b. Raphanus maritimus, 



Sm. 



Area 12***67***** 13** 16* [18]. 



South limit in Cornwall and Sussex. 



North limit in Bute and Can tire. 



Estimate of provinces 7. Estimate of counties 10. 



Latitude 50 — 56. Atlantic type of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends, on the coast level, to the Peninsula. 



Ascends, on the coast level, to the West Highlands. 



Range of mean annual temperatm-e 52 — 48. 



Native. Littoral. Reported to grow in the counties of 

 Sussex, Cornwall, Somerset, Pembroke, Merioneth, Wig- 

 ton, Ayr, and the isle of Bute; also, according to the 

 Shetland Flora, on the eastern shores of Bressa, which 

 should be confirmed on more experienced authority than 

 the late youthiul author of that Flora. Specimens of R. 

 Raphanistrum, brought from the Azores, uiduced me to 

 suppose that even R. maritimus might come within the 

 range of variation for that changeable species ; but on rais- 

 ing a series of descendants, fom- successive years, from the 

 Azoric stock, and finding them gradually becoming more 

 and more like the R. Raphanistrum of our corn-fields, and 

 therefore not approaching neai'er to R. maritimus, I am 

 thrown back upon the presumption of the distinctness of 

 these species until I can get an opportunity of raising de- 

 scendants of the coast plant in an inland garden. 



