Polygonum hydropiperoides Michx. var. hydropiperiodesWashington: Whatcom County: Lake Terrell West side of lake.
Abundant. Zone of plant ca. 2 ft. of water. Phenology: Fertile.
L. M. Sundquist 1770, Jul 17, 1968
WWB, Accession: 11791
Polygonum hydropiperoides Michx. var. hydropiperiodesWashington: Whatcom County: Lake Whatcom-East of Austin Creek-End of small bay- West of point.
Phenology: Fertile.
L. M. Sundquist 1857, Aug 24, 1968
WWB, Accession: 11892
Polygonum hydropiperoides Michx. var. hydropiperiodesWashington: Whatcom County: Lake Terrell South end of lake.
Shallow water- mud bottom. Associated with Hippuris vulgaris. Phenology: Fertile.
L. M. Sundquist 1711, Jun 27, 1968
WWB, Accession: 11452

Polygonum hydropiperoides Michx. var. hydropiperiodesWashington: Whatcom County: Lake Fazon.
48.86611° N, 122.36639° W,
Uncertainty: 587 meters. Coordinate Source: GeoLocate.
North area of lake. Phenology: Buds.
L. M. Sundquist 1808, Jul 25, 1968
WWB, Accession: 11486
Polygonum hydropiperoides Michx. var. hydropiperiodesWashington: Whatcom County: Northwest end of Lake Terrell, at boat launch area.
Muddy lake shore. Phenology: Buds.
R. J. Taylor 1609, Jul 14, 1967
WWB, Accession: 9076