reputed to be aboriginal in Britain. 389 



all very few so far as I saw, but still striking as being here at 

 all. Had not these plants of this species arisen from seeds 

 of it mixed with the seeds of the clover or other seeds pur- 

 chased ? When the clover and grasses, or other plants, which, 

 together may form the new herbage, shall have, as they doubt- 

 less will shortly, spread and interlaced each other, and in- 

 vested the earth's face as if with a carpet, they will, it is not 

 to be doubted, prevent the Camellna sativa and other annual 

 plants from growing, and from maintaining an existence there. 



JLepidium sativum, I have seen a plant of, upon which was 

 young fruit, at the foot of a wall in Friars' Lane, Bury St. 

 Edmunds. 



Tussildgo frdgrans, plants of, are in a state of health and 

 growth, on the outside of a garden wall in Bayswater, and in 

 a meadow. 



The three last instances relate to the establishing wild in 

 Britain species of plants habitually exotic to Britain. — J. IX 



T. F. has communicated in I. 378., that he had found the 

 Linaria Cymbal aria on the lower part of a rock near Bar- 

 mouth, North Wales. Mr. Dovaston has made known, in 

 II. 400. 401., that he had previously sown seeds of it there. 

 The late Rev. Lansdown Guilding had written the following 

 remarks relatively to T. F.'s notification of his discovery : 

 he has identified their connexion by " 378. [of Vol. L] Note 

 on Snapdragon." 



" So many plants have followed man in his travels over 

 the globe, that we must already be cautious in fixing their 

 proper region. In the woods of the interior of St. Vincent, 

 I have stumbled in amazement on the inhabitants of Asia, 

 and the beautiful products of the South Seas, growing lux- 

 uriantly among the lawful occupants of the soil, while all 

 traces of the labour of man, who introduced them there, are 

 obliterated, and the mosses and creepers have hidden the 

 very foundation of his dwelling. These plants point out the 

 gardens of former settlers, who selected these elevated solitudes 

 from their coolness, and for change of air ; but a century 

 hence they will perplex the botanists who do not call to mind 

 the confusion which attends the benefits we derive from the 

 commerce and wanderings of the human race. Much dispute 

 has arisen as to the propriety of placing in local floras and 

 faunas species only once observed, or of suspected origin. 

 Where insects, for instance, are found about hot-houses, or 

 plants discovered in cultivated grounds, great caution must 

 be observed : but we may carry this caution much too far. 

 There may be some reason for excluding Acherontia A'tropos 

 from the British fauna, as having probably been introduced 



