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POTAMOGETON fluitans.
Long-leaved Floating Pond-weed.
1ETRANDRIA Tetragynia.
G e n . C h a r . Cal. none. Petals 4. Style none. Seeds 4.
S p e c . C h a r . L ow e r leaves lanceolate, pointed and
membranous; upper elliptic-lanceolate, somewhat
coriaceous: all on footstalks.
S y n . Potamogeton fluitans. Roth. Germ. v. 1. 7 2 . v. 2.
202. Hoffm. Germ. arm. 1800. 81. fVillden. Sp.
P I. v. 1. 7 1 3 . Sm. FI. B rit. 1391.
A N O TH E R new Potamogeton is here added to the British
Flora. This has been found in the river at Scole, Norfolk,
by Mr. Woodward and Mr. Turner; in ditches in the marshes
near Beverley, by Mr. Teesdale; and in Lilleshall Mill-pool,
Shropshire, by the Rev. Mr. Williams. It is, like others of
its genus, perennial, flowering in August and September.
Writers who have described this on the continent consider
it as allied to P . natans; we think it more approaches P . lu-
cens, v. 6. t. 376.
Its leaves are much more coriaceous than those of the lucens,
in which respect it more agrees with natans; particularly the
upper leaves, which float on the water, and are somewhat
elliptical, with very considerable footstalks: the lower are
membranous, more lanceolate, acute, tapering down into
less evident footstalks. Flower-stalks axillary, from various
parts of the stem, solitary, long, but little swelling. Spike
reddish. The whole plant is remarkable for a reddish hue,
especially in the upper part.