[Bulrushes and Tules: The Genus Schoenoplectus East of the Cascade Mountains of Oregon and Washington]

Three Square

Schoenoplectus americanus

Synonyms: Scirpus americanus, Scirpus chilensis, Scirpus olneyi

Three Square: Schoenoplectus americanus (Synonyms: Scirpus americanus, Scirpus chilensis, Scirpus olneyi)

What is possibly a patch of three square as seen along the western shore of the Deschutes River about one-half mile upstream from its confluence with the Columbia River........July 27, 2011.

Inflorescence of Three Square: Schoenoplectus americanus (Synonyms: Scirpus americanus, Scirpus chilensis, Scirpus olneyi) - Inflorescence of Three Square: Schoenoplectus americanus (Synonyms: Scirpus americanus, Scirpus chilensis, Scirpus olneyi) - Inflorescence of Three Square: Schoenoplectus americanus (Synonyms: Scirpus americanus, Scirpus chilensis, Scirpus olneyi)

What is possibly a patch of three square as seen along the western shore of the Deschutes River about one-half mile upstream from its confluence with the Columbia River.........July 27, 2011. The similar Schoenoplectus pungens is supposedly also found at this location and I haven't yet been able to determine the difference between the two, at least from these photos.
Paul Slichter