NATURALIZED ASTERS. 83 



Kceleria cristata, Pers. Fine specimens between Blair and 

 Bruar, East Perth. 



Eguisetum limosum, L. Near Aberfeldy, Mid Perth. 



Chara fragilis, ysly .' jmlchella, WaUr. Pond, Blair Atliol, East 

 Perth. 



NATURALIZED ASTERS. 

 By James Britten, F.L.S. 



During the stay of Prof. Asa Grray in England last year, I had 

 the opportunity of obtaining his opinion on the names of certain 

 North American species of Aster which have established them- 

 selves in this country. As these have been published in periodicals 

 under different names, while one has not hitherto been placed on 

 record, it may be of interest to give the result of Prof. Gray's 

 determinations. 



Aster imniculatus, Lam. (non Ait.). — This appears to be the 

 species most thoroughly established in England. In the National 

 Herbarium at South Kensington are specimens from Surrey (from 

 "near Thrimble Bridge, Thames Ditton, Sept., 1865," sent to the 

 Thirsk Botanical Exchange Club by Mr. Watson, and recorded by 

 him in its Report for 186G (p. 12) under the name of A. leiican- 



themus, Desf., "one root from 1860 to 1865 it will be 



likely soon lost by building changes "); and from the Barnes and 

 Richmond localities on the bank of the Thames, recorded by 

 Mr. Hiern in Journ. Bot., viii., 8 (1870), under the name of 

 A. Novi-Belgii) ; Oxfordshire (" Banks of canal near Worcester 

 Gardens, Oxford, Oct., 1880, H. N. Ridley"; this is probably the 

 plant recorded under the name of A. Tradescanti by Mr. H. Boswell 

 in the ' Phytologist ' for 1860 (iv., 101, N. S.) as being then "firmly 

 established" in several places near Oxford); Worcestershire 

 (on an island in the river at Holt, near Worcester, opposite the 

 lock-house, and also on the bank of the river lower down, Miss E. 

 Chandler, Aug., 1880); and Cumberland ("Shore of Lake Der- 

 wentwater, Sept. 15th, 1868, coll. Mary Edmonds"; on this a long 

 note will be found in the ' Report of the London Botanical Ex- 

 change Club for 1868' (pp. 10, 11), and ' Journ. Bot., vii., 239, 

 under the heading "Aster saWjnus, Willd." ; it is stated that the 

 plant had been known in this locality "for thirty years past," 

 and was then growing "in great luxuriance, established in a bed 

 of sedges, perhaps to the extent of the eighth of an acre"). 



A. Novi-Belgii, L. (non Ait.). — Prof. Gray gives this name to 

 the plant of the Tay-side, near Perth, distributed by the Exchange 

 Club as A. longifoliiis, Lam., on w^iich a note is published in the 

 Report for 1869, p. 12 (Journ. Bot., viii., 261). In this note 

 " several other species of Aster" are stated to grow on the banks 

 of the Tay. 



A. l(Bvis, Jj. — "Park Place Wood, near Henley, Oxfordshire, 

 Herb. Rudge " ; no date, but Rudge died in 1846. 



There are several other records of introduced Asters, but the 



