144 REPORT OF THE LONDON BOTANICAL EXCHANGE CLUB. 
Alisma Plantago, var. lanceolatum. Kew Gardens; Mr. Baker. 
The wild state of var. lanceolatum is usually smaller than that of var. 
genuinum, but the cultivated specimens sent by Mr. Baker are of large 
size, showing that var. lanceolatum is not merely a stunted state of 4. 
Plantago ; and I can see no reason to alter the opinion I expressed 
in * English Botany,’ 3rd edition, that it does not deserve to be con- 
sidered a subspecies. 
Potamogeton filiformis, Nolte. Loch Gelly and Camilla Loch, Fife ; 
J. Boswell-Syme. Although not previously recorded from Fife, this 
plant grows in immense abundance in both these Lochs. When fresh, 
the leaves are of a bright grass-green colour, by which it may be dis- 
tinguished from P. pectinatus at some distance. The stems are shorter 
and the lateral branches much more nearly parallel to the main stem 
than in Z. pectinatus, giving the plant much resemblance to Ruppia 
maritima. It is most abundant in shallow water, and very fine in the 
stream running out of Loch Gelly, where it forms a dense mat at the 
bottom of the water, the long peduncles floating with the current quite 
clear of the leaves. P. pectinatus also grows in Loch Gelly, but very 
sparingly, and in deeper water. 
Wolfia arrhiza, Wimm. “ From a pond in a large meadow on 
Apse Farm, near Sunbury Lock, between Walton-on-Thames and 
Moulsey Hurst, Surrey. The same plant occurs also in a splash of 
water, very near the church, in the parish of East Moulsey, a short half- 
mile from Hampton Court station."—H. C. Watson.* 
Juncus nigritellus, Don? Shore of Coniston Lake, Cumberland ; 
ore. These specimens seem to me ordinary J. lampro- 
carpus. They have 8 or 9 heads, and the perianth-leaves are all blunt. 
In a dried state, I am, of course, unable to say whether the leaves are 
terete or compressed, but, if they be the former, it will be a proof that 
one of the alleged distinctive characters of J. nigritellus is sometimes 
to be found on J. lamprocarpus. On Ben Lawers, Braemar, and in 
Orkney, I have collected J. lamprocarpus with strongly-compressed 
leaves and decidedly acute inner perianth-leaves, with the number of 
heads varying from 2 to 20. 
Scirpus parvulus, Róm. et Schultes. On mud flats at the mouth of 
the river Avoca, Wicklow, Ireland ; Mr. A. G. More and Mr. Charles 
* The Rev. W. W. Spicer found = this year (1869) in a ditch at Byfleet, 
near Weybridge, Surrey.—H. TRIME 
