Scirpus pungens Vahl × Scirpus triqueter L. ?

Washington: Wahkiakum County: Northeast shore Steamboat Slough, Steamboat Slough Rd., north shore of Columbia River circa 1 mile southeast of Skamokawa. Elev. 3 ft.
46° 15.6' N, 123° 26.4' W; T9N R6W S17
Small muddy wetland, full sun, with Juncus oxymeris, Bidens cernuus, Alisma triviale, Scirpus triqueter. Rhizomatous, few pedicelled spikelets; stems less sharply angled below. Phenology: Fruits.

P. F. Zika 17741, Aug 29, 2002
With F. Weinmann
WTU, Accession: 379116