380 NOTICES OF BOOKS AND MEMOIES. 



Mr. T. E. Archer Briggs, thus named, from roadside, Swilly, near 

 Plymouth, South Devon, 4th August, 1879. Dr. Boswell says 

 " This seems the same as a plant which I raised from Mr. Briggs's 

 seed, and which I have cultivated for many years at Bulmuto, 

 where very few fruits ripen. Among the plants raised from the 

 seed of the original specimen there are considerable differences, 

 some of them inclining towards pulcher, and some of them towards 

 conglomerate. I have no doubt about its being a hybrid between 

 these two." 



Paimex, hybrid between conglomeratus and pulcher, from Lewes, 

 Sussex, September, 1879. Sent by Mr. J. H. A. Jenner with the 

 note that " the Hon. J. L. Warren confirms my naming. Both 

 ■pulcher and conglomeratus grew on the spot. I could get no root 

 leaves." Dr. Boswell believes this is " rightly named, though it is 

 nearer pulcher than any of my seedings from the Devon plant." 

 Mr. T. B. Archer Briggs says that, " had not Mr. Warren con- 

 firmed the naming, I might have been disposed to suspect the 

 specimen to be only depauperised pulcher, especially as the 

 branches have sprung, late in the season, from a stem previously 

 cut or broken off. It is much more like pulcher than Plymouth 

 examples from Swilly, presumed to be hybrids between conglomeratus 

 and this species." 



Potamogeton heterophgllus, Schreb. Mr. A. Bennett sends a 

 smgle plant from the canal between Woking and Weybridge, 

 Surrey, with stolons from the axils of the upper leaves. (See 

 Dr. Boswell's remarks upon this character in P. nitens, E. B., 3rd 

 ed., vol. 9, p. 37). 



P. Zizii, Mer. & Koch. Mr. Andrew Brotherston sends a 



farther supply from Cauldshiels Loch, Melrose, Boxburgh, 9th 



August, 1879, to show the difference in general appearance which 



the same species exhibits from the influence of two different kinds 



of seasons. Mr. Brotherston mentions that the specimens sent to 



the Club last year (see Keport for 1878, p. 19 ['Journ. Bot.,' 



1879, p. 252]), "were smaller, more compact and firmer in 



texture, not drawn out like those of 1879. Mr. Baker remarks, 



in last Beport, < that / '. Zizii appears to be a large deep-water 



iorin of P. heterophgllus; &c. So far as I have seen, Zizii 



invariably grows near the edge of the loch in comparatively 



shallow water. The specimens gathered in 1878 were growing 



in water less than one foot deep; in 1879 about two feet. 



1 have seen type heterophyllus in deeper water at Coldingham 



Loch, Berwick. P. pralongus and P. crispus, both of which occur 



at Cauldshiels Loch, prefer the deeper parts, as neither are visible 



from the side, but very long specimens of both are frequently 



washed ashore." 



Ophioglnsswu vulgatinn, L., b. ambiguum, Coss. & Germ. A few 



specimens only were collected by Mr. Charles Bailey, 21st July, 

 1879, m the damp sandy ground at the foot of the sandhills, on the 

 land side, one mile west of Dyffryn railway station, between 

 /fl-nr^. Barmouth, Merioneth lire. It is figured on plate iG 

 of bir \\ illiam Hooker's « British Ferns,' and the Welsh specimens 



