REPORT FOR I 893 
425 
of P. lucens. — Edward F. Linton. Of the Avon plant Mr. Bennett 
says “Yes;” of that from R. Frome “Correct, though not so charac- 
teristic as some specimens.” 
Potamogeton salicifolius , Wolf. In the Wye, Carey, Herefordshire, 
May and July, 1893. This is the first year I have seen the plant since 
about 1877, although I have searched a good deal. At Carey it grew in 
three spots, in a range of half a mile : two in shallow water with a 
gravel bottom ; one in deep water, on mud. Rev. E. F. Linton, to 
whom I shewed it,Avas fortunate enough to find one or two immature 
fruits. — Augustin Ley. “The former specimens gathered in July, 
1877, and determined by Prof. Babington as the salicifolius of 
Wolfgang (although he then supposed this to be the same as 
Lonchites , Tuckerman), along with the 1893 specimens, seem to 
me to represent the plant of Wolfgang, Besser, and Gorski ( P. 
lithuanicus). Dr. Tiselius contends with some reason, that they are, 
along with his P. Ups alien sis, forms of P. decipiens, Nolte, the hybrid 
commonly accepted as lucens x perfoliatus. Perhaps such a cross with 
a long-leaved form of lucens , and the same of perfoliatus , might produce 
such a leaved plant as salicifolius. One can see with some reason the 
hybridity of the usual form of decipiens as about halfway, while others 
decidedly show a more lucens-X ike type. But Wolfgang’s plant shows 
a peduncle and spike that can hardly be referred to either supposed 
parent. It may be that the original plant was a product of P. 
inacrophyllus , Wolf., and some perfoliatus form, but so far as I know 
no inacrophyllus ( longifolius , Gay.) form grows at the Herefordshire 
station. While not denying that this plant may be a hybrid, I cannot 
satisfy myself that it can be placed as a decipiens state merely, much 
less differences are accepted as specific now, than these show in a 
series. On the other hand some of the Hants specimens of decipiens 
have a decided look of some of the forms P. Upsaliensis , Tis., but the 
difference has yet to be bridged over, I consider.” — A. Bennett. 
P. perfoliatus , L., var. cordato-lanceolatus , Melk. Coron Lake, 
Anglesey, August, 1893. — J. E. Griffith. “Seemingly a true 
perfoliatus form.” — A. Bennett. 
P. Berchtoldi , Fieber. Pools, Marden, W. Kent, 20th July, 1893. 
Determined by Mr. Arthur Bennett, who regards it as a variety of 
P. pusillus. It differed markedly from the ordinary P. pusillus of the 
district (and of S. E. England generally) by its densely tangled growth, 
very dark green colour, narrower leaves, and much earlier flowering 
season (fully a fortnight in advance of the other). It occurred only in 
two contiguous pools, about half a mile E. of Mardep Station, which 
were almost choked with its masses. — E. S. Marshall. “Yes. I 
cannot call it a full species. I believe it to be very near akin to 
Fieber’s plant, though I have never seen a type, and many specimens 
pass under the name which are not so.” — A. Bennett. 
P. undulatus , Wolfg., var. Cooperi , Fryer. Canal, Loughborough, 
Leicestershire, 8th July, 1892. Coll. E. F. Cooper. Comm. A. 
Fryer. “ If this is really a hybrid it is far too near perfoliatus. Its 
stem fresh would soon decide, and I have no doubt Mr. Fryer has 
seen to this.” — A. Bennett. 
