USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Wetland Plants and Plant Communities of Minnesota and Wisconsin


(Potamogeton amplifolius Tuckerman)

Large-leaved Pondweed

PONDWEED FAMILY (Potamogetonaceae)


FIELD CHARACTERISTICS: An aquatic, perennial herb. Fully developed submerged leaves have a characteristic quarter-moon shape because of their strongly-arched, folded condition. The submerged leaves are (2.5)3.5-7.2 cm. wide with 24-40(52) nerves. Floating leaves (if present) are elliptical, 4-10 cm. long with 28-50 nerves. Fruits are 4-5 mm. long, including the beak. In flower from July to September.

ECOLOGICAL NOTES: Large-leaved pondweed is found in lakes and rivers, usually at depths less than 9 feet, but it has been found in waters to 18 feet in depth.

SOURCE: Fernald (1970); and Voss (1972).

Previous Section -- Illinois Pondweed (Potamogeton illinoensis Morong)
Return to Contents
Next Section -- Water Milfoil (Myriophyllum verticillatum L.)

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 06:32:26 EST
Sioux Falls, SD [sdww54]