314 '1'HE botanical exchange club of the BRITISH ISLES. 
Arum ilalicipn, Miller. Trevowah, Crantock, 8th June 1907, 
and Treago, Crantock, ist July 1907, v.-c. i, West Cornwall. Tlie 
latter gathering was from a shaded place with a North aspect. — 
C. C. ViGURS. 
Potamogeton falcatus, Fryer. Ditch in Hocking Fen, Ramsey, 
Hunts, 7th Aug. 1907, coll. E. W. Hunnybun and A. Fryer, 
see ‘ Journ. of Bot.,’ 1889, p. 65.— S. H. Bickham. This cannot 
spread without difficulty as the fen drain or ditch is a small one 
and almost a cul de sac owing to one end being more or less 
grown up. We found the tenant of the land working on it, and 
he told us that he clears out the drain or ditch every year, but still 
the plant is abundant. We might have sent you a barrow load. — 
E. W. Hunnybun. This has occurred in Nottinghamshire, where 
it was found by Prof. Carr. — A r. Bennett in a letter to S. H. B. 
P. Zizti, Roth., narrow-leaved form. Ditch in Mepal Fen, 
Cambs., coll. E. W. Hunnybun and A. Fryer, 26th July 1907. — S. H. 
Bickham. P. angusiifolius, Bercht. and Presl. — H. J. R. 
P. Cooperi, Fryer. From the classic locality, Loughborough 
Canal, Leicestershire, 23rd July 1897. Kindly communicated by 
Mr. Cooper. — G. Claridge Druce. X P. Coopcri, Fryer. River 
Soar at Quorn, v.-c. 55, 19II1 Aug. 1907. — F. L. Foord Kelcev. 
P. crispus X perfoliatus {x P. Cooperi, Fryer), according to ‘ Lon. 
Cat.,’ Ed. X.— H. J. R. 
Eleocharis muiticaulis, Smith. Penhallow Moor, St. Newlyn 
East, West Cornwall. 24th July 1907. Although the season was 
dry, and not far advanced, some of the spikes are already 
viviparous. — C. C. Vigurs. Looks right ; but it is only in flower. 
— E. S. M. 
’ Scirpus cernuus, Vahl. {S. filiformis, Savi.), var. pygmacus 
(Kunth). Fistrel Beach, Newquay, West Cornwall, 3rd August 
1907. The variety is much more common in this district than the 
type is. Vide ‘ B. E, C. Report,’ 1905, p. 186 (46), as to nomen- 
clature; but I prefer sticking to the ‘ Lon. Cat.,’ Ed. IX. according to 
our Regulations, until names shew a tendency to “ crystallize out ” of 
their present “ liquid ” state. — C. C. Vigurs. As Mr. C. B. Clarke 
pointed out, Kunth’s name is that of a synonym, not a variety. 
This is S. filiformis, Savi., var. monostachys. — E. S. M. 
S. triqucter, L. Mud banks by the Thames, between Rich- 
mond and Hammersmith, Sept, and Oct. 1907. — A. B. Jackson. 
S. lacustris X triqucter (S. carinatus, Sm.). Mud banks by 
the Thames between Kew and Hammersmith, Aug. and Sept. 
1907. — A. B. Jackson and K. Domin. This bulrusli forms 
a conspicuous feature of the riverside vegetation on the Surrey side 
