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Wetland and Aquatic Plants
of
Oklahoma
Interactive Keys: Submersed
Pondweed
(Potamogetonaceae)
2. Narrow leaf
pondweeds (3 mm wide or less, much
longer than broad)
Note: The narrow
leaf pondweeds can easily be confused with southern water nymph or
horned pondweed. However, the pondweeds
have fruits and flowers in a spikes.
Leafy
pondweed (Potamogeton
foliosus
Raf.)
Native perennial.I
click
thumbnails to enlarge
Notes:
The seeds (achenes) of this species has a hooked projection at the top. Leaves tend to be rounded or blunt at the
tips.
Small
pondweed (Potamogeton pusillus
L.)
Native perennial.
Notes: A
character to observe when trying to distinguish the narrow leaf
pondweeds is
the of a small, bulb like winter bud. This
structure is found only on small pondweed.
Sago
pondweed (Stuckenia pectinatus
(L.)
Boerner)
Native perennial.
Notes:
Distinguishing sago pondweed from leafy and small pondweed can be
difficult. Two characters to note is
whether the plant produces a creeping root (rhizome) and whether the
flower and
fruits are well spaced on the stem (up to 10mm apart, particularly for
fruits
lower on the stalk. Sago pondweed has
cross walls or partitions in the leaves, which can be determined by
running
your fingers along the blade. The
leaves are sharp tipped (acute) as well.
Last update: 1/30/04
Comments to : Bruce Hoagland
bhoagland@ou.edu
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