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

Myriophyllum heterophyllum Michx. × Myriophyllum hippuroides

Oregon: Lane County: Fern Ridge Reservoir on Long Tom River, east side of causeway at south end of Gibson Island, 2.7 air kilometers west of Fir Butte. Elev. 115 m.
44.075° N, 123.273° W
Coordinate Source: Specimen Label.
Shallow water, full sun with Potamogeton foliosus, 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 submerged to emergent aquatic in shallow water.

Peter F. Zika 28583, Oct 12, 2016
With R.E.Brainerd, W. Messinger, J. Spear
WTU, Accession: 416706, Barcode: WTU-V-036335