27 
Potamogeton lanceolatus , Sin. “ In a small brook (the River 
Lligwy) on Rhos Lligwy, a quarter of a mile south of the new National 
School, N.E. coast of Anglesey, September 1, 1875.” — C has. Bailed. 
A large supply of specimens, several with flowers, but none with 
fruit, as was also the case with fresh examples sent in the month of 
September to Dr. Boswell by Mr. F. M. Webb (see Eng. Bot., ed. 3, 
vol. ix., p. 35). 
Potamogeton obtusifolius, M. & K. “Sands near Culross, Perth, 
August, 1875.” — T. Dkummond. If in W. Perth new to v.c. 87. 
Zannichellice forms. Mr. Baker has drawn up the following 
description of the varieties or subspecies known to be British, and 
Dr. Boswell has made valuable notes on two or three. — T. R. A. B. 
Zannichellia palustris, L. The varieties or subspecies of Zanni- 
cheliia represented in our flora appear to be four in number, viz. : — 
1. Z. brachystemon, Gay. Carpels 2-4 to a flower. Shortly 
pedicellate. Pedicel usually about a quarter as long as the fruit, 
which is three-quarters to one line long, and creuate on the back. 
Style about half as long as the fruit. Stigma large, crenulate. Fila- 
ment one-eighth to quarter inch long. Anther two-celled. This is 
the common inland form throughout the country. Here belong Z. 
palustris, Eng. Bot., edit, iii., t. 95, and of the “ Herbarium Normale ” 
of Fries, Z. repens of Boreau, and Z. dentala of Lloyd. Z. repens, 
Bonning., as figured, Reich., Ic. FI. Germ., tab. 16, tig. 20, is a sub- 
ordinate form with slender habit, pedicel none, a small carpel, and a 
very large stigma. Z. major, Bonug., Reich. Ic., vii. , t. 16, fig. 24, 
a form of stouter habit with larger fruit crenulate on the back. 
2. Z pedunculata, Reich. Ic., vii., t. 16, fig. 21. Pedicel from 
half as long to as long as the fruit. Carpel oblong-fusiform, three- 
quarters to one line long, strongly muricated on the back. Style 
nearly or quite as long as the carpel. Stigma large, crenulate. 
Stamens with a two-celled anther and filament a quarter to half-inch 
long. This is a net unfrequent coast-form, but I think runs into No. 1 
by insensible gradations, and a plant gathered by Mr. Warren in 
Kensington Gardens should apparently be placed here. Here belong 
Z. maritima of Nolte, Z. gibberosa, Reich. Ic., t. 16, fig. 22 and 23, and 
Zi 'pedicellata, Eng. Bot., ed. 3, t. 926. The Z. pedunculata of the 
“ Herbarium Normale ” of Fries comes about midway between this 
and the last. 
3. Z. polycarpa, Nolte ; Reich. PI. Crit., t. 757 ; Reich. Ic. FI. 
Germ., t. 16, fig. 23. Carpels often 5 or 6. Pedicel none or very 
short. Carpel cylindrical, under a line long, crenulate on the back. 
Style not more than one-fifth to one-fourth as long as the carpel. 
Stigma large, repand. Stamens with a bilocular anther and filament 
