86 III. INTKODUCED SPECIES. 



those views, although the puhlished statements and 

 opmions of A or B or C maj^ to a foreigner fully appear 

 to do so. Examples were occasionally adduced in former 

 volumes of this work, in order to exhibit that want of 

 veracity, or want of carefulness, or want of clear-sighted- • 

 ness, which together have introduced so much that is fal- 

 lacious or positively false into our botanical records. 

 Such examples, by no means all that could have been 

 adduced, may be found under the dozen species named in 

 the annexed list ; and truth-seeking botanists will do well 

 to read and ponder them : — 



Delphinium Consolida, vol. 1, p. 97 ; vol. 3, p. 377. 

 Koniga maritima, volume 1, page 134. 

 Oxalis stricta, vol. 1, p. 272 ; vol. 3, p. 403. 

 Geranium striatum, volume 1, page 258. 

 Sempervivum tectorum, volume 1, page 403. 

 Achillea tomentosa, vol. 2, p. 133 ; vol. 3, p. 463. 

 Gentiana acaulis, volume 2, page 168. 

 Lysimachia ciliata, volume 2, page 298. 

 Tulipa sylvestris, volume 2, page 449. 

 Cynodon Dactylon, volume 3, page 145. 

 Lagurus ovatus, volume 3, page 182. 

 Cynosurus echinatus, volume 3, page 214. 

 Secondly, in deciding upon the claims of plants to be 

 deemed native or otherwise in Britain, M. De Candolle is 

 greatly guided by the records of their occurrence in neigh- 

 bouring portions of the Continent, — in Scandinavia, Ne- 

 therlands, West Germany, and North-west France. Such 

 records may well be admitted as valuable secondary and 

 corroborative evidence, which can usefully be adduced in 

 support of more direct proofs. But they must be held of 

 less authority when brought forward against any primary 

 and positive evidence, afforded by the actual conditions 

 under which the species are observed in Britain itself. 



