Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
55. Potamogetonaceae, the Pondweed Family
1. Potamogeton L. -- Pondweed
3. Potamogeton crispus L. -- Curly pondweed
Stems slightly compressed, mostly 1-2 mm thick, usually branching, mostly
4-8 dm long. Leaves all submersed, sessile, slightly clasping, linear-oblong
to linear-oblanceolate or oblong to oblanceolate, 3-8 cm long, 3-10 mm wide,
3- to 5-nerved, rounded at the tip, narrowed at the base, the margin usually
undulate-crisped, finely serrate; stipules slightly adnate at the base,
4-10 mm long, early shredding. Winter buds commonly produced in some
of the leaf axils, indurate, ca. 1-2 cm long. Spikes dense, short-cylindric,
1-2 cm long; peduncles terete, about as thick as the stem, 2-5(7) cm
long. Fruits brown, ovoid, the body 2-3 mm long, the beak very prominent,
2-3 mm long; keels low, rounded. Apr--Jun. Shallow water of lakes, ponds and
slow-moving streams, especially recreational waters; locally abundant at scattered
locations; (Intro. along both coasts and inland in N.Amer.).
Previous Section -- Potamogeton amplifolius Tuckerm.
-- Largeleaf pondweed
Return to Family -- Potamogetonaceae - The
Next Section -- Potamogeton diversifolius Raf.
-- Waterthread pondweed