POTAMOGETONACEAE
Potamogeton natans L.
(floating-leaved pondweed)

Lakes Ranch, Marin Co.
Coll. Herbert L. Mason
July 24, 1946
Mason #178023
UCMP-SFES #21

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Morphology, Distribution, and Habitat (After Mason, 1957)

The nutlets are 3-5 millimeters long, strongly keeled on the back. The lateral angles are scarcely evident, and the beak is erect. The plant is found in marshy ponds and lakes, montane, and coastal regions in the San Bernadino Mountains, Sierra Nevada, and the North Coast Ranges.