37 
See Journal of Botany, 1928, 361. The original five large 
clumps, which I first found in 1927, have this year, 1929, 
again produced only heads of the compacted form as in the 
two preceding years. An extended search among the large 
colonies of the type which occur in the district has hitherto 
failed to reveal any other plants of this form. With each 
specimen I have included heads from type plants which were 
growing in contact with the variety. — L. B. Hall. Mr. Hall 
sends fruiting spikes of his variety with those of the normal 
species. The comparison suggests that the variety may be 
a hybrid with J . effusus or J . conglomerate , the flowers being 
smaller than those of the type and the capsules very irregularly 
developed. The seeds, too, are smaller and of a different 
colour, and it would be interesting to test their fertility. A 
comparison of rootstocks might furnish some further evidence 
if the form is of hybrid origin. — H. W. Pugsley. 
Sparganium ramosum Huds. subsp. neglectum (Beeby). 
Asch. and Graebn. [818]. Sept. 25, 1929, Purwell, Hitchin, 
Herts.— J. E. Little. [823] Ippolyts Brook, Hitchin, Herts, 
Oct. 3, 1929. — J. E. Little. [818] Is from an old mill-head, 
stagnant water and deep alluvium. The stem and leaf 
bases are red-brown. [823] Is from the same brook a little 
higher up, in running water. The stem-bases are white. 
There seems no reason to separate the two upon this colour 
difference. Upon the fruits they all appear to come under 
neglectum. The subspecies polyedrum Asch. and Graebn. does 
not occur in this district. — J. E. Little. [818] Yes ; this is 
certainly Beeby’s plant. — J. Fraser. 
Potamogeton alpinus Balb. Abundant in ditch near Newark 
Mill, Ripley, Surrey, Aug. 25, 1929. Fruiting specimens 
rather scarce, as in the case of P. acutifolius from another 
part of the same ditch. — E. C. Wallace. I consider this 
correct. — J. Fraser. Good examples of normal P. alpinus 
showing the obovate coriaceous floating-leaves with petioles 
always shorter than the lamina which is gradually narrowed 
to the base. In deep water these floating-leaves are very 
seldom produced and, as a result, students then experience 
some difficulty in identifying the species. The submerged 
leaves are obtuse, lanceolate, sessile and usually tinged with 
red. They vary much in width — from 7-35 mm — and in 
length may reach even 15 cm. — W. H. Pearsall. The ditch 
was rather deep, and as these plants were growing up amongst 
