REPORT FOR 1913. 



501 



against the bridge pier on the quieter side of the waterway. No trace 

 of flower or fruit was observable. The canal water at this spot is 

 lukewarm, very similar to what occurs in the locality for Chara 

 Braunii Gmel., at Reddish near Stockport. — C. Bailey. "Very 

 interesting. Leaves delicate and transparent like a Potaynoyeton. 

 Was the plant flowering in the shallower part of the Canal " — C. E. 

 Salmon. "Yes, nice clean specimens of the forma submersa.'' — G. C. 

 Druce. 



Potamogeton polygonifolius Pourr., vai*. pseudo-Jluitans Syme. 

 [Ref. No. 379.] Teste A. Bennett. Higher Laith Tarn, N. Lanes, 

 v.-c. 69 b., Sept. 12, 1913. Not previously recorded for this area. — 

 W. H. Pearsall. 



Potamogeton alpiniis Balb. , forma. Ditch near the Leighton Beck, 

 v.-c. 60, W. Lancashire, July 1913. — A. Wilson. "No, this is 

 P. coloratus Hornem." — C. E. Salmon. " This is P. coloratus Hornem. 

 = P. plantagineus Du Croz. It is recorded for Lake Lancashire 

 {Bot. Ex. Cluh Rej). for 1890, p. 320, 1891). The Silverdale station, 

 'In* a pit on the Cemetery road, C. Bailey'; will surely not be many 

 miles from the present station given, as the Leighton Beck forms the 

 boundary of the vice-county." — A. Bennett. 



X Potamogeton lanceolatus Sm. River Lwigy, Anglesey, July 

 19u8. — G. C. Druce. "This specimen shows better than most I have 

 seen the sound judgment of Mr Fryer with respect to this plant, as 

 expressed in his Potam.ogeto7is of the British Isles, p. 63, 1913, and from 

 Journ. Bot., p. 177, 1890, p. 337, 1894. It is unfortunate that 

 Ascherson and Graebner (Syn. Fl. Mittel eur., ed. 2, p. 536-7, 1913) 

 have exactly reversed Mr Fryer's opinion on this and the French 

 plant, the P. rivularis Gillot." — A. Bennett. 



X Potamogeton Kirkii Syme = P. spargajiifolius Bab. River 

 Maam, Galway, Sept. 1906. — G. C. Druce. "Graebner under P. 

 natans x polygonifolius = x P. gessnacerisis Fischer Mitt. Bay. Bot. 

 Ges. xxxvii., 172, 1905, remarks 'Hue forsan pertinet P Kirkii 

 Syme in Eiig. Bot., ed. 3, ix. 31, 1869.' Ascherson and Graebner in 

 their Syn. Fl. Mittel eur., do not notice the plant in their first or 

 second editions, 1913. Supposing this, whence come the lower elon- 

 gated leaves? Mr Fryer's remarks {Pot. British Isles, p. 17, 1898) 

 seem to me much nearer the facts — -' Mr Baagoe sent me a beautiful 

 form collected by himself in Denmark, with the name of P. fluitans 

 forma rivularis Lange, which seems to connect our species with P. 

 fluitans. But it is always diflicult, and often unsafe to judge from 

 dried specimens, especially when not prepared in a similar manner.' 

 Mr Baagoe's specimens, it may be noted, were most beautifully 

 preserved, and do suggest a passage from our plant to fluitans. It 



