38 
Hottonia and Elodea, some had no floating leaves but had 
long submerged ones. — E. C. Wallace. An interesting 
contribution from Surrey. — H. W. Pugsley. 
Potamogeton acutifolius Link. Ditch near Newark Mill, 
Surrey, Aug, 25, 1929. — E. C. Wallace. Yes ; fruiting 
spike with short peduncle and most characteristic fruits. 
Very acceptable. — W. H. Pearsall. There are no fruits to 
this, but the winged, leafy stems and the acute leaves with 
numerous veins, the middle one being much the strongest, are 
quite the characters of the species. — J. Fraser. 
Potamogeton obtusifolius Mert. and Koch. Hedge Court 
Mill pond, Surrey, Aug. 17, 1929. — E. C. Wallace. Answers 
the description and illustration. The linear leaves are 
obtuse or very shortly mucronate, and three to five nerved, 
the middle nerve much the strongest. — J. Fraser. Fine 
specimens of P. obtusifolius, showing well-developed fruiting 
spikes. This species produces fruits very freely, and those 
sent in, show the so-called “ 3 keels ” very plainly — the main 
one having two subsidiary ones parallel to it. The leaves 
are 3 nerved — the usual form — but 5 nerves are by no means 
uncommon, although Syme (Eng. Bot.) says he has never seen 
such. Koch gives 3-5 veined. When sending the late 
Mr. A. Bennett the plants from which PI. 52 of British 
Pondweeds was drawn, I also enclosed plants from the neigh- 
bouring Colthouse Heights, with 5-veined leaves, and I have 
similar specimens from other localities. Leaves possessing 
even 7 nerves — as figured by Fieber — have been seen from 
Arctic America. The 5-veined leaves are very commonly 
mistaken for those of P. Friesii, but the habit of that species 
is quite different. Hagstrom (Crit. Res. p. 116) says “the 
midrib and lateral nerves grow very faint and join in the 
very apex." They join well below the actual tip in British 
specimens, and the lateral nerves usually form a sharp 
curve before doing so. — W. H. Pearsall. 
Scirpus maritimus Linn. var. macrostachys Willd. From 
a large solitary clump by a dyke on Higham Marshes, W. 
Kent, Oct. 5, 1929. — E. C. Wallace. Yes, very good macro- 
stachys. — E. Drabble. This seems to me to be right. — J. 
Fraser. This appears correctly named, but the authority 
for the variety should be Visiani, FI. Dalmatica, 1, p. 109. — 
H. W . Pugsley. The extreme variability of the inflorescence of 
S. maritimus on the shores of the Bristol Channel, its tidal 
