Myriophyllum heterophyllum Michx. × Myriophyllum hippuroides

Oregon: Lane County: Shallow inlet channel lined with rockwork, beneath Kruger Park and Richardson Point, northwest shore of Fern Ridge reservoir on Long Tom River. Elev. 115 m.
44.12006° N, 123.3175° W
Coordinate Source: Specimen Label.
Full sun, with Myriophyllum spicatum. Fruit scarcely longer than wide, as in M. heterophyllum, fruit cross-section elliptical, is in M. hippuroides, anthers 1.1-2 millimeters, as in M. heterophyllum, common stranded aquatic in drawdown zone, and submerged to emergent aquatic in shallow water. Phenology: Fruits.

Peter F. Zika 28574, Oct 12, 2016
With R.E.Brainerd, W. Messinger
WTU, Accession: 416707, Barcode: WTU-V-036338