80 THIRSK BOTANICAL EXCHANGE CLUB. 
bluntish. In S. fragilis the scales vary exceedingly in length and 
shape, and are sometimes nearly naked ; in 5S. aléa it is the same, and 
they are sometimes quite naked; in S. triandra they are always quite 
naked, more tenacious in texture, broader, and in shape bluntly 
spathulate. : 
S. undulata. Mr. Watson sends also a set of specimens in leaf 
from North Surrey, thus labelled on the authority of Dr. Anderson. 
This species is easily distinguishable from S. triandra, when in flower, 
by its shaggy scales, elongated style, and in the normal form by its 
silky capsule. 
Hymenophyllum Wilsoni. Sent by Mr. W. Richardson from Hare- 
hope Moor, near Eglingham, on the Northumberland flank of the 
Cheviots. This is questioned as a plant of the Tyne province, in 
‘Cybele’ supplement; but there are specimens in Winch’s herbarium 
gathered on Simonside by Sir Walter Trevelyan, who has recently re- 
found it on the same hill. 
Inrropuctions.—The principal plants which come under this head, 
which we have to notice this year, are the following :— 
Alyssum calycinum. Field near Little Marlow, Bucks. J. Britten. 
Neslia a On the beach at Sandown, Kent, August, 1865. 
Mrs. Ben 
sus ities, Mitcham, Surrey. H. Trimen. 
Saponaria Vaccaria. Beach at Sandown, Kent. Mrs. Benson. 
Arenaria montana, Wimbledon Common, Surrey; first noticed 
. seven years ago by Mr. Pollock,.of Wimbledon. W. Thistleton Dyer. 
Trifolium agrarium, Linn. (T. aureum, Pollich.) —Clover-field at 
Dounton, High Wycombe, Bucks. J. Britten. A weed in a barley- 
field at Hawnby, N.E. Yorks. (J. G. Baker), and seen several times by 
both of us in forage fields in the neighbourhood of Thirsk. 
Vicia (Ervum) monanthos. Numerous specimens in a field of E. 
sativa, at Allenheads, Northumberland, 459 yards above sea-level, July 
and August, 1865. J. G. B. 
Bupleurum protractum. Meadow near Gloucester. Dr. St. Brody. 
Ammi majus. Bank of the Severn, near Gloucester. Dr. St. Brody. 
(See Journ. of Bot. 1865, p. 26.) 
Artemisia scoparia, with Hibiscus Trionum, Malva crispa, and other 
mostly mid-European species, in great abundance i in London on the 
site of the Exhibition of 1862. 
