1 14 THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
subject. I must, however, say this that I think M. Corbiere is 
decidedly wrong in his conclusions, and believe them to be founded 
on insufficient materials. 
Potamogeton Zizii , M. & K. Hedge Court mill pond, Surrey, 18th 
August, 1884. With the ordinary state of this I send some of the 
aerial leaves formed when the plant is left stranded by the receding 
water, as occurs with heteropliyllus. No true floating leaves were seen 
this year. — W. H. Beeby. 
Potamogeton Griffithii , A. Bennett. Lake, Llyn-an-afon, Car- 
narvonshire. — J. E. Griffith. Several specimens of this plant. I 
have had this growing with prcelongus and rufescens for three years ; 
its growth is much slower than either, and it does not die down 
during the winter, the upper part only rotting away. By this means I 
have assured myself that it is not prcelongus ; at no stage of its growth, 
from the first leaves to the flowering stage, can it be mistaken for 
prcelongus , on careful examination of its structure (leaves, stem, &c.). 
I hope to succeed in getting my specimens to fruit this year. 
Potamogeton zoster if olius, Schum. Shropshire. — E. Beckwith, 
com. Arthur Bennett. An interesting addition to the Salopian 
Flora ; but in the Herbarium of Trinity College, Dublin (in sheet 45*), 
there is a specimen of this with the note “Shropshire, Mr. Borrer.” 
Mr. C. Bailey sends a large supply of excellent specimens from the 
Cromford Canal, Derbyshire. 
Potamogeton pa?iormitanus , Biv. Ditch, near the sea in Wolverton 
Parish, W. Norfolk, July, 1884. “ It had the habit and very 7 much 
the appearance of Scirpus fluitansd — G. C. Druce. I should have 
named this pusillus , f., it does not agree with my authentic example 
of Bivoni’s plant. 
Zannichellia repens , Boeningh. Vide Reichenbach’s leones, Tab. 
766 (p. 23), No. 1,003. “ Radicans, filamento germina vix superante, 
stigmatibus repandis nuculis, subsessilibus laevibus vel dorso multi- 
crenulatis,” Reich, ap. Moesl. et FI. Germ. Exc. p. 6. In a shallow 
stream running from Witney Common towards Witney, by the road- 
side to North Leigh, Oxon, July, 1884. — G. C. Druce. 
Zannichellia ? species In the tepid water of the canal, 
Reddish, near Manchester, 24th June, 1884. The same plant as 
was distributed last year under the name of Z. repens, Boenningh. 
See page 96 of Report for 1883. — Charles Bailey. “It seems 
somewhat different from all my club Zannichellice , though I 
think nearest poly car pa, Nolte.” — T. R. Archer Briggs. “ Is it 
Zannichellia polycarpa ? But hardly. Is it an exotic plant ? ” — Prof. 
Babington. “ Z. palustris.” — Dr. Buchanau, Bremen. I cannot 
agree with Dr. Buchanau, unless he would mean a very aggregate 
species, but I can get no reliable information on this plant ; no two 
opinions agree, except Mr. Briggs and Prof. Babington. For the 
present it must remain without a name. 
Liparis Loeselii. Cambridgeshire. — A Fryer. Norfolk. — F. J. 
Hanbury and Arth. Bennett. I had the pleasure, last June and 
July, of accompanying the rediscoverer of this interesting inhabitant of 
the Fens. In Norfolk the plant occurred in great profusion, in many 
cases as many as 6-10 in a clump, accompanied by a plentiful growth 
