136 THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
where the Glen Coe coaches change horses, 22nd July, 1885. 
Charles Bailey. 
Poiamogeton polygonifolius, Pourr., var. ericetorum. Ditch running 
into Loch Laich, near Port Appin, Argyll ., J uly, 1 885 . — Charles Bailey. 
“A more robust plant than what is usually so named. I think Dr. 
Boswell would call this typical polygonifolius .” — A. Bennett. 
P. polygonifolius , Pourr., var. fluitans. Recess, Connemara, 
Galway, W., Aug., 1885. — W. R. Linton. “I am quite puzzled to 
know what Mr. Linton means. I do not know of any plant that Dr. 
Boswell has so named. Is it not a slip for v. pseudo-fluitans , Syme ? 
I think this must be the case, as the specimens are the same as sent 
by Rev. E. F Linton, and from the same place and date. These 
specimens do not represent the plant as shown by the Edinburgh 
herb, to which Dr. Boswell refers as the most characteristic specimen 
he has seen. The only difficulty in assigning these Irish specimens 
to natans , is the small spikes. It seems to me that the fruit alone can 
decide the true position of this form.” — A. Bennett. 
P. sparganiifolius , Laest. Maam, Galway, Aug., 1885 — E. F. 
and W. R. Linton. “This seems fairly to agree with specimens 
authentically named, but, in the absence of fruit, it cannot be held to 
be absolutely certain.” — A. Bennett. 
P. Lonchitis , Tuckerm. R. Boyne, Navan, Meath, Aug., 1885. 
E. F. and W. R. Linton. — “ Seems to agree very well with the 
American plant.” — A. Bennett. 
P. nitens , Web. Loch of Boardhouse, Birsay, Orkney, July, 1885. 
W. Irvine Fortescue. “ I have had this Birsay plant sent to me 
by Dr. Trail. It is a puzzle, but perhaps best placed under nitens . 
Of named forms, it comes under P. borealis , Tis., which includes a 
series of forms departing from nitens , and approaching to heterophyllus P 
A. Bennett. 
P. nitens , Weber, var. salicifolius , Koch. To this variety I 
doubtfully refer plants which grow in a swift stream (the Lusragan 
Bum) which drains the Black Loch, and runs into the sea at Connel 
Ferry, near Oban, Argyll, 21st July, 1885. It is the prevailing 
Potamogeton of the stream, the only other species being the true P. 
natans ; its stems were from one to three yards long, frequently many- 
branched, and bearing a profusion of flowering spikes. — C harles 
Bailey. “ Here again is a form that is not strictly nitens nor 
heterophyllus , similar plants are found in Perth and Donegal. It again 
comes close to one of the series of forms Dr. Tiselius names P. 
borealis ; but this in habit and facies represents a wide range from 
specimens approaching to Zizii and decipiens to others near nitens 
and heterophyllus. I have not seen Koch’s plant, so cannot say this 
is not it, so at present it must remain under Mr. Bailey’s name.” — A. 
Bennett. 
P. flabellatus , Bab. Ramsey brick pits, Hunts, August, 1885. 
A. Fryer. “Doubtless correct, Mr. Fryer having submitted many of 
these forms to Prof. Babbington.” — A. Bennett. 
P. flabellatus , Bab. I sent, two years since, the upper leaves 
of flowers of this plant from the R. Wey, Guildford, Surrey. It 
occurs in the weir-stream of Guildford Lock, and, in consequence 
