WTU:V
346446 P. F. Zika 16514 2001-09-10
U.S.A., Washington, Clark, West shore of Lake River Slough, ca. 1 mile south of Ridgefield., 45.808333 -122.741667
WTU:V
328158 Cathy L. Maxwell 1139 1991-09-22
U.S.A., Washington, Wahkiakum, Whites Island at upriver end of Puget Island in Columbia River., 46.1498 -123.3295
WTU:V
350519 P. F. Zika 18115 2002-10-17
U.S.A., Washington, Clark, N shore of Columbia River, S of Route 14 at milepost 14, 1 km W of Oak Park., 45.578333 -122.396667, 5m
WTU:V
350554 P. F. Zika 18124 2002-10-17
U.S.A., Washington, Skamania, N shore of Columbia River, near St. Cloud picnic area, NE of Skamania Island., 45.598333 -122.113333, 5m
WTU:V
18787JWT-A J. William Thompson 3738 1927-09-04
U.S.A., Oregon, Along Columbia Beach, on Hayden Island.
WTU:V-Vascular
18787JWT-B J. William Thompson 3797 1927-09-09
U.S.A., Oregon, Multnomah, Sauvies Island., 45.736628 -122.799314
WTU:V
263769 Wilhelm Suksdorf 1746 1911-11-02
U.S.A., Oregon, Multnomah, On the Willamettte River at Lower Albina, Prtland., 45.549426 -122.692982
WTU:V
263672 Wilhelm N. Suksdorf 2845 1899-07-14
U.S.A., Oregon, Albina, Portland.
WTU:V
230083 Wilhelm Suksdorf 1746 1911-11-02
U.S.A., Oregon, Multnomah, On the Willamettte River at Lower Albina, Prtland., 45.549426 -122.692982
WTU:V
2488JWT Wilhelm Suksdorf 1746 1911-11-02
U.S.A., Oregon, Multnomah, On the Willamettte River at Lower Albina, Prtland., 45.549426 -122.692982
WTU:V
230084 Wilhelm N. Suksdorf 2845 1899-07-14
U.S.A., Oregon, Albina, Portland.
WTU:V
370843 Ben Legler, David Giblin 3096 2005-09-21
U.S.A., Washington, Clark, Beach and bike trail access point, ca. [circa] 0.5 mile south of Frenchman's Bar Waterfront Park, northwest of Vancouver., 45.666617 -122.757617, 3m
WTU:V
371811 Peter F. Zika 11469 1992-04-16
U.S.A., Oregon, Multnomah, Delta of Sandy River, south shore of Columbia River, northeast of Troutdale airport., 45.5699 -122.3807, 1 - 1m
WTU:V
371894 Peter F. Zika 17853 2002-09-13
U.S.A., Oregon, Multnomah, Northeast shore of Multnomah Channel, south tip of Sauvie Island, Columbia River., 45.628333 -122.815, 2m
WTU:V
373587 Peter F. Zika 24175 2008-08-28
U.S.A., Oregon, Wasco, South shore of Columbia River, west of Dalles Dam, town of the Dalles., 45.603333 -121.145, 22m
WTU:V
388113 R.E. Brainerd, N. Otting 1629 2009-10-15
U.S.A., Oregon, Multnomah, Sauvie Island, along the Multnomah Channel, near the Sauvie Island Bridge., 45.627731 -122.816273, 9m
WTU:V
393960 Peter F. Zika 26436 2013-09-09
U.S.A., Washington, Clark, West shore of Vancouver Lake., 45.680167 -122.740667, 5m
WTU:V
409335 Cathy Maxwell 13-66 2013-08-28
U.S.A., Washington, Cowlitz, Island Park Recreation Area on north side of Lewis River along Highway 503., 45.93921 -122.68172, 14m
WTU:V
429865 Ben Legler 13843 2015-09-11
U.S.A., Washington, Clark, East shore of Columbia River ca 0.8 km south of Frenchmans Bar Regional Park., 45.673203 -122.764733, 3m
WTU:V
429998 Ben Legler 13908 2015-09-13
U.S.A., Washington, Cowlitz, Wetland on east shore of Columbia River 1.6 km due north of mouth of Lewis River., 45.869171 -122.778605, 3m
WTU:V
416268 Dominic Maze, Christa von Behren 162 2016-08-09
U.S.A., Oregon, Clackamas, Above seasonal backwater of Willamette R, E of Elk Rock Island., 45.4346 -122.6462
WTU:V
Peter F. Zika, Peter Dunwiddie PWD-18-509 2018-08-15
U.S.A., Washington, Benton, Umatilla National Wildlife Refuge, Rock Island., 45.90948 -119.62831
WTU:V
Peter Zika, Peter Dunwiddie PWD-21-193 2021-08-24
U.S.A., Washington, Benton, Near Hanford townsite in backwater slough on Columbia River, 46.680389 -119.46119