nearly straight stalks, about as long as the leaves. Nuts
small, half as large as in P. natans, obliquely ovate, the
back rounded and obtuse, both when fresh and when dry.
This plant, which has been unaccountably excluded from
the last (4th) edition of Hooker’s British Flora, is far from
being an uncommon species in wet ditches, small streams,
ponds, and bogs. The specimens figured were gathered
upon Haldon, in Devonshire, by Mr. Borrer and myself, in
July, 1839 ; and I possess it from Shropshire, Leicestershire,
Sussex, Denbighshire, and Mayo. It is distinguished
from P. natans, with which it is propably confounded by
most botanists, by the form and size of its fruits as well as
by other characters. It is shown to be the P. parnassifolius
of Schrader (P. natans, e. of the Deutschland’s Flora,) by a
specimen named by Mertens in Mr. Borrer’s herbarium.
In my Primitice Florce Sarnicce this synonym is incorrectly
referred to P. plantagineus.—C. 0. B.
