gentleman detected it, in deep water, near the larger
island in Rydal W ater, Westmoreland. It is nearly allied
in appearance to P. prtelongus, but has not the amplexi-
caul and hood-tipped leaves of that plant. It has also been
confounded with P . lucens • but exclusive of the proportionate
size of its leaves, it has no serratures on their margins,
nor is the spike densely flowered as in that well-
known plant. The publication of these two new British
species will, it may be hoped, procure for this most interesting
genus that attention from English botanists which
it so well deserves. There can be little doubt that several
species still remain to be detected by careful observers,
more particularly in the mountain countries, and in Ireland.
—C. C. B.
