310 TKANSACTIONS AND PUOCKEDINGS OF THE [Sess. lxiv. 



observed in 18^76, ic was not cultivated in tlie open in 

 Sweden, but it was grown in the Botanical Garden at 

 Copenhagen about 1865, though it soon died out. 

 Professor Areschoug deals at length with the objections 

 which arise as to the plant having been introduced from 

 any part of Europe, either by the agency of man, animals, 

 or water : and points out that the plant grov/s above the 

 zone of drift-weed that is in the sand zone with Fsamiaa, 

 Elymns, etc. In Denmark (the north of Zealand), Dr. 

 Gunner Anderson found it in the summer of 189 2 

 (" Botaniska Xotiser," 189:^, ]). 197) in a locality quite 

 similar to the Scanian station, and in association with 

 Ps'~(mina. In North America, on tlie eastern free-board of 

 the United States, it occurs in similar circumstances, and 

 the signiticance of this is still further increased by the fact 

 that A. sidlcriana lives in Kamtschatka among quite similar 

 environments. The Professor considers that it would have 

 l)ei'n almost impossible for this plant to have passed over 

 all the interjacent tracts, and ibund a direct path to 

 localities exactly resembling those which it atfects in its 

 jjrst home, i£ it liad originated from gardens in Europe and 

 Xortli Amei'ica. Against its I»eing native in the European 

 and American localities, is tlie fact that it lias for so long a 

 time escaped attention ; but the Professor points out that 

 it may be at a distance easily mistaken for A. viaritima or 

 A. absinthiviii. And, again, it is a very late liowering 

 species, l)eing in full Hower on 22nd September, in Scania; 

 and he also points out that the rather uninteresting zone of 

 vegetation in wliicli it grows may also liave led to the 

 plant remaining unnoticed. As the Professor i-emarks, the 

 plant is a variable one, tlu^ plant from KamtschaXka dil'ier- 

 iny from the Scanian i)lant, as do l)oth from the tigure in 

 the " Pefugium Ijotanicum," which is evideirtly from a 

 cultivated specimen. The I'rofessor shows that an almost 

 equally eccentric geographical range to A. sidlcriana is to 

 be found in another specdes of the genus, namely, A. 

 laciniata, Willd., wJiich occurs in several ])arts of the 

 island of Oland and in a few localities in Central Germany, 

 whence there is a ga]» in its range right to the Altai 

 Mountains, from which locality it is distrilnitcd ;dl the way 

 to Amur. In fafl, he is of opinion that A. dellcriana 



