57 



works, and specimens of Cape woods and plants. From the Rev. J. 

 E. Leefe, the second fasciculus of his ' Salictum Britannicum Exsic- 

 catum.' From Dr. Dcwar, Dunfermline, plants from the river Congo, 

 &c. From Mr. Charles Lawson, jun., plants from the Rocky Moun- 

 tains, &c. 



The following communications were read : — 



1. Notice of the discovery of Alsine stricta, in Teesdale, by Messrs. 

 G. S. Gibson, and J. Tatham, jun. Specimens of this interesting 

 addition to the Flora of Great Britain, kindly communicated by the 

 above named gentlemen, were exhibited. 



2. On the genus Spirulina, by Mr. Ralfs, Penzance. One species 

 only, the S. tenuissima of Kutzing, was described. 



3. Notice of the discovery of Cirsiura setosum, Bieh., near Culross, 

 by Dr. Dewar. This plant, which is also new to Britain, was disco- 

 vered in July last, by Dr. Dewar, Dunfermline, growing on the coast 

 of the Frith of Forth, near Culross ; and through the kindness of that 

 gentleman, numerous specimens were supplied to the Society. It is 

 a native of Odessa, and has probably been introduced from thence 

 among agricultural seeds or ballast. 



4. Journal of a Tour through j^art of the United States and the Ca- 

 nadas (continued), by Mr. James M'Nab. 



In the last part of this paper read before the Society, Mr. M'Nab 

 gave an account of the botanical features of the country in the neigh- 

 bourhood of Stillwater, and concluded with an examination of the 

 woodland grounds in the vicinity of Whitehall ; the present portion 

 embraces the journey from the latter place to Montreal. 



" Entering another steam-boat at the southern extremity of Lake 

 Champlain, the course is winding and narrow, having considerable 

 tracts of level ground extended on each side. The woods for the first 

 sixteen miles are very various, the principal trees being the wild cher- 

 ry [Primus Virffiniana), elms, walnuts, sugar-maple, with the aspen 

 poplar {Populus tremuloides). The rocky grounds overhanging the 

 lake were densely clothed with the Arbor-vitae. After having fairly 

 entered upon the expanse of the lake, the appearance of the lofty 

 white or Weymouth pines (Pinus strobus), towering above the deci- 

 duous trees, along the rising grounds at the base of the hills, was re- 

 markable; most of them being destitute of branches, which gave them 

 more the appearance of palms than pines. About Essex, half way 

 along, the lake widens, and all at once the wooded rocky land by the 

 water's edge is changed for a rich champaign. The fields of the dif- 



VOL. IT. I 



