NOTICES OF BOOKS AND MEMOIRS. 249 



with the following note : — " This occurs in two West Yorkshire 

 localities, some twelve miles apart, in both of which it has been 

 known for over a dozen years. It continues to spread along 

 certain lines of waterway. Along the banks of the canal, and 

 Eiver Aire, from Lake Loch Stanley towards Castleford, in the 

 vice-connty of S. W. York, it is found for miles ; and also grows 

 in profusion in the stonework of the canal between Armley Mills 

 and Kirkstall in the vice-county of Mid-west Y^ork. It was first 

 recorded in print in 1866 (' Naturalist,' O.S., vol. ii., p. 80), by the 

 late T. W. Gissing — a Wakefield botanist — under the name of 

 Aremonia agrimonioides, as ' pretty abundant by the canal running 

 from Stanley to the Calder.' Now, in 1878, this humble alien 

 weed offers an example of perfectly successful colonisation only 

 paralleled by Ariacharis or Impatiens fiilra. It was probably 

 originally introduced with baulks or props of Norway pine used 

 about the canal locks or in adjoining coal-pits, but it has now 

 become as ineradicable as the indigenous weeds to be found with it 

 by the towing-paths where it occurs, and in future editions of our 

 descrix3tive manuals deserves a place much more than many other 

 species of less recent introduction. It is a most prolific seeder, 

 and the seeds germinate wherever they fall, apparently whether 

 fully ripened on the parent plant or not." 



Rosa sepium. One of the most valuable contributions this year 

 is a good supply of this species from a hedge near Puttenham, 

 in Surrey, from Messrs. H. & J. Groves. This for the first time 

 settles it down firmly as an English plant. I got it near Hind 

 Head many years ago, but saw only a couple of bushes. So far as 

 I know it has never been seen in Warwickshire since Mr. Bree 

 gathered it a generation ago. 



FiUhus mucronulatus. Mr. G. Nicholson sends, from the neigh- 

 bourhood of Kew, specimens of a London bramble which is 

 regarded by Babington as a variety of mucronulatus, a stronger- 

 growmg plant than the type, with many setae on the barren stem, 

 end-leaflets round (not obovate) with a decided cusp, panicle with 

 more numerous and stronger prickles, and denser, more numerous 

 flowers with shorter pedicels. I know of no special name for this, 

 but it is a well-marked form that comes in between mucronulatus, 

 villicaulis, and fuscoater. The true mucronulatus, which Dr. 

 Boswell sends this year from the neighbourhood of Aberdour, 

 in Fife, we do not get anywhere in the neighbourhood of London. 



R. villicaulis. Mr. Bagnall sends a plant from New Park, Mid- 

 dleton, Warwickshire, which Bloxam named R. heteroclitus, Wirtgen. 

 This seems to me a slight variety of R. viliicauUs, and another 

 plant from Mr. Bagnall from the same locality named adscitus by 

 Bloxam to be typical villicaulis, as we understand it in England. 



R. ramosus, Blox. Minworth, Warwick, J. Bagnall ; and 

 Bii-cham, Egg Buckland, South Devon, T. E. A. Beiggs. This 

 seems to me a well-marked bramble, allied to rluunnifolius. I have 

 never met with it about London, or in the north of England. 



it. conjUfolius var. it. defjener, MuUer. Under this name, for which 

 I am indebted to Genevier, I have distributed a few speciinens, from 



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