400 THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
the ‘Naturalist’ for January 1908. — C. C. V. Also sent by S. H. 
Bickham and E, C. Salmon from the same station : — 
Fotamogeton epihydrum, Rafinesque (i8o8). 
pensylvanicus, Chamisso (1827). 
pionilus, Wolfgang (1827). 
Claytonii, Tuckerman (1843). 
fluitans, Pursh (now Roth.) (1814). 
Nuttalii, Chamisso (1827) teste Morong in N. Am. 
Naiadaceie. 
There is little doubt that Rafinesque’s name published in 
‘Medical Repository,’ 2 Hex. 5, 354 (1808) belongs to this plant, 
but I have seen no specimens so named by him, and so use 
pensylvanicus^ of which I have seen specimens named by Chamisso 
in the Berlin herb., but in the Delessert herb, at Geneva there 
is a specimen from Rafinesque named fluitans ; but with no date 
unfortunately, and it is this plant. It is distributed fairly well in 
N. America. I have seen specimens from 22 of the States (U.S.A.) 
and from 6 of the Provinces of Canada. — A. Bennett. 
P. coloraius, Hornem, form. Fen Ditch, St. Mary’s, Ramsey, 
Hunts., v.-c. 31, 20th July 1908. Coll. E. W. Hunnybun ; Comm. 
S. H. Bickham. This form is one that often occurs ; and there is 
no special name for it. — A. Bennett. 
P. nitens, Webw., var. involutus, Fryer. Black Bush Drain, 
Pond’s Bridge, Hunts., v.-c. 31, 3rd Aug. 1908. Coll. E. W. 
Hunnybun ; Comm. S. H. Bickham. Ascherson and Graebner in 
their ‘ Syn. FI. Mitteleurop’ i — 325 (1897) make this P. 7 iiiens, 
Web., V. lacustris /3 mvolutus. — A. B. 
P. Biilupsii, Fryer. Fen ditch, St. Mary’s, Ramsey, Hunts., 
v.-c. 31, 20th July 1908. Coll. E. W. Hunnybun; Comm. S. H. 
Bickham. So named by Mr. Fryer; but I understand that lie 
declines to agree to it being P. angustifoHus x coloraius as given in 
‘ Fond. Cat.’ loth Edit. — S. H. B. On a sheet given to me by 
Mr. Fryer he names it as above ; and = P. coriaceus x planta- 
gifieus, so that strictly he is right in denying it comes under 
angustifolius as he understands it. It is my fault that it is so 
placed, and although 1 consider coriaceus comes under P. angusti- 
folius, and most do, perhaps he does not. Ascherson and Graebner 
call it X P. Billupsii x Zizii, var. coriaceus. — A. Bennett. I was 
with Mr. Hunnybun when x P. Billupsii was found at Wood 
\\’alton. P. coloratus grew near. — G. C. Druck. 
Naias flexilis, R. and S. Loch h’ada, Colonsay, v.c. 102, 
July 1908. Coll. M. McNeill ; Comm. A. Bennett and C. E. 
Salmon. 
