192 THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
with the small tufted shoots of the la 7 id-form^ which this species 
produces as freely as P. ?iatans does. This state of the plant was 
also left ungathered with the hope of preserving the vigour of the 
root-stock unimpaired for the production of fruit next season. These 
sub-aerial shoots survive throughout the hot dry summer, and grow 
until killed by the frosts of late autumn. This species seems dying 
out in the fens, probably through the frequency with which the drains 
are cleared of weeds. Hence, too, the plants are cut down before 
they have time to ripen their fruit, which seems to set freely in natural 
stations. On the other hand though cultivated specimens grow into ex- 
traordinary vigour they show no tendency to flower at present. Our plant 
has afflnities with P. natans on the one hand, and with the coriaceous- 
leaved forms of the luce 7 is-gxo\}i^ on the other. — Alfred Fryer. 
Pota 77 iogeto 7 i Griffiihii^ A. Bennett (vide Journal of Botany, March, 
1883). Llyn-an-afon, near Aber, Carnarvonshire, June, 1887. — J. E. 
Griffith. 
P. prcEloTigus^ Wulf. Walton-on-Thames, Surrey. I send a few 
examples from this county. — W. H. Beeby. 
P. zostercefolius^ Schum. Ditch below Walton Bridge, Walton-on- 
Thames, Surrey, 7th August, 1887. I send a few examples from a 
second locality, found by Mr. H. Groves. — W. H. Beeby. 
Pota 77 iogeio 7 i flabellatiis, Bab. A splendid series of this distributed 
by Mr. Alfred Fryer, in sets of three, viz. : — 839. Drain by Fortrey 
Hall Farm, Welches Dam, 12th Aug., 1887; 840. Same locality, 
22nd Aug., 1888; 876. The New Bedford River, 15th July, 1887; 
all in Cambridgeshire, Co. 29. “ The broader leaved forms from the 
Ouse and the New Bedford River agree well with Professor Babington’s 
typical plant ; the flner leaved forms from Welches Dam are towards 
the P. scopariiis^^ of British authors. The Professor has kindly 
examined all my gatherings for some seasons past, and considers all 
the plants now sent as belonging to his P. flahellatus. I have 
carefully watched these forms for four years, and have satisfied myself 
by the habit of growth and foliage, as well as by the fruit, that these 
plants cannot come under P. pectmatus^ as at present restricted by 
Professor Babington. Occasionally, but not constantly, all these 
flahellatus forms produce broad flat leaves at all seaso 7 is of the year in 
our fenland waters ; I think such leaves will only be found constantly 
in situations where the plant is unable to perfect its fruit. In culti- 
vation some shoots from the same rootstock produce them, others 
do not, and they vary in abundance from season to season. Hence 
we ought not to attach too much importance to their presence in 
distinguishing between flahellatus and pectmatus^ but look chiefly to 
the differences between the fruit, on which Professor Babington 
founded his species.” — Alfred Fryer. 
Ry 7 ichospora fusca, R. and S. Bog near Poole Junction, Dorset, 
27th July, 1887. — W. Moyle Rogers. 
Carex areTiaria^ L. ligerica^ J. Gay. Near Llandudno Junction, 
1 8th Aug., 1887.^ — J E. Griffith. Simply C. are 7 iaria. St. Mary’s, 
Scilly, 3rd July, 1883. — Augustin Ley. Correctly named. 
C. aquatilis^ Wahl. Teifi Marshes, Tregaron, Cardigan, 9th 
August, 1887. — Augustin Ley. 
