21 



P. alpinus, Balb. Floating on the surface of the water, 

 Barmston Drain, Danswell Lane, nr. Beverley, E. Yorks, v.c. 

 61, May, 1899.— C. Waterfall. Yes. A. B. 



P. lanceolatus, Sm. Nr. Ballyvaughan, Co. Clare, Ireland, 

 June, 1899. Legit P. B. O'Kelly.— D. T. Playfair. 



P. crispus, Linn. var. sevmUis, Huds. Fide Rev. W. R. 

 Linton. Canal, Renishaw, Derbyshire, v.c. 97. July, 1899. 

 — C. Waterfall. These specimens differ from the state of 

 P. cvispus generally accepted by British Botanists as Hudson's 

 P. serratiis, by the indistinct, practically obsolete serration of 

 the margins of the leaves, in the axillary branchlets 

 having the lower leaves directly sessile on the stem, not 

 mounted on sheath-like stipules, and in the presence of minute 

 glands on the stem at the base of many of the leaves. The 

 habit of the plant is rather that of P. Friesii, or of young states 

 of P. ohUisifolius, than of P- cvispus; the flower-spike too indicates 

 some kinship to P. Friesii. The Rev. W. R. Linton, who 

 discovered the plant, tells me that it grew with P. crispus and 

 P. PnVs^V,and he now thinks that it is a hybrid between the two. 

 This is the view I took when I first saw the specimens, and I 

 am disposed to believe that Friesii is the second parent. When 

 growing Mr. Linton supposed it to be P. obtusifolius, misled no 

 doubt by the foliage of a darker green than that of P. Friesii, 

 In accordance with the plan I have followed in the case of 

 hybrid Potamogetons, I propose for this plant the name of its 

 discoverer ; who has permitted me to describe it, and who has 

 supplied details of the habit of the living plant which leave 

 little doubt of the correctness of the conclusion we independently 

 arrived at as to its hybrid origin. Those who object to accept 

 the name of xPotamogeton Lintoni may label their specimens 

 P. Friesii X P. crispus; in which case, however, it is to be hoped 

 they will be consistent enough to discard such names as P. 

 fluitans, P. nitens. and P. decipiens. P. Lintoni is very distinct 

 from the closely allied hybrid P. Bmnettii { = P. crispiisxP. 

 obtusifolius) — Alfred Fryer. 



P. zostevifolius, Schum. Stalham Dike, E. Norfolk 

 24/7/1899.— J. and A. Bennett. 



P. obtusifolius, M. and K. Stalham Dike, E. Norfolk, 

 24/7/1899.— J. and A, Bennett, 



