TETRADYNAMIA— SILIQUOSA. Raphanus. 227 



In the isle of Bute and other places. Rev. Dr. Walker, in the year 

 1753. On the beach 3 miles from the Mull of Galloway. Mr. 

 J. Mackay. In various parts of the coast of Ayrshire, Galloway, 

 &c ; Mr. G. Don. Hooker. On rocks near Beachy Head, Sus- 

 sex, Mr. D. Turner and Mr. Borrer. 



Biennial. May, June. 



Root large and succulent, sometimes, according to Dr. Walker, 

 lasting three years, and preferable to Horse Radish for the table. 

 Herb larger than the foregoing. Stems 3 or 4 feet high, rough 

 chiefly at the base. Radical, and lower stem-leaves, large, in- 

 terruptedly pinnate, more abundantly serrated than in R. Ra- 

 phanistrum; upper ones stalked, simple and undivided, serrated 

 like the rest. Fl. more yellow, and less veiny, than in that 

 species. Pods more strongly and broadly furrowed, as well as 

 jointed, destitute of roughness. The synonyms of Morison and 

 Petiver, in Fl. Br., are very inapplicable to this species, with 

 respect to the root as well as leaves, and I have therefore omitted 

 them here. 



Cattle were observed by Dr. Walker to be very fond of the herbage. 



