Sagittaria platyphylla (Engelm.) J.G. Sm.
Annotated by Alexander Staunch, 28 Jul 2014.

Oregon: Multnomah County: Portland, Blue Heron Wetlands, ponds N of Blue Heron Drive. Elev. 2 m.
45.59159° N, 122.64755° W
Coordinate Source: Specimen Label.
Invading pond previously cleared of invasive Ludwigia hexapetala. First observed in 2013 as sparse population of 10-15 individuals, increasing to over 400 in 2014. Native to SE United States. Specimen consists of 2 sheets, both with same accession number (17733 A & B). Phenology: Fruits.

Alexander Staunch s.n., Jul 28, 2014
HPSU, Accession: 17733