506 ADDITIONAL NOTES, ETC. 



of Britain, lies in the two cii'cumstances, of its not flower- 

 ing usually till the second summer in our gardens, and of 

 its being frequently damaged by frost in winter. A 

 "steep wood" might afford that combination of dryness 

 and shelter which would tend much to preserve a biennial 

 plant from the injurious effects of winter frost, and it 

 might thus present a suitable situation for the natural 

 growth of a species, even where the climate of the open 

 country surrounding it would be too severe for the regu- 

 lar and continued reproduction of the same species. On 

 the whole, however, the evidence is but slight in favour 

 of the aboriginal nativity of this species in Britain ; most 

 of its recorded stations being confessedly suspicious. 



976. Mercurialis perennis, vol. ii. p. 367. 



Miss Boswell has found this plant in Orkney, which 

 may warrant the indication of a " general " area for it, 

 although I am not able to adduce any other authority for 

 its occurrence northward of Boss, 



Xd. Cannabis sativa, vol. ii. p. 372. 



The Rev. W. W. Newbould supplies the omission in 

 volume second, by a reference to ' Babington's Primitise 

 Florae Sarnicse.' 



984. Ulmus montana, vol. ii. p. 373. 



The south limit extends into Cornwall, on authority of 

 Mr. Pascoe's list. 



985. Ulmus suherosa, vol. ii. p. 374. 



According to Mr. Pascoe's list, this species also has 

 been reported to occur in Cornwall, although not ob- 

 served in the county by that botanist himself. 



989. Fagus sylvatica, vol. ii. p. 377. 



The south limit of this tree extends into Cornwall, on 

 authority of Mr. Pascoe's list. 



990. Carpinus Betulus, vol. ii. p. 378. 



Dr. Bromfield was unprepared to cite any good station 



