The genus Schoenoplectus of Renfrew County:
A comparative study

By Grant A. Bickel, 2020

Schoenoplectus subterminalis (Torrey) Soják, Water bulrush

Schoenoplectus subterminalis is common in Renfrew County, found growing densely in creeks and streams. The entire plant is submerged except for the short inflorescence poking above the water surface or floating on the surface.

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Spikelet, achenes and scales of Schoenoplectus subterminalis

Figure 1. Spikelet, achenes and scales.
Spikes of Schoenoplectus subterminalis

Figure 2. Spikes.
Spikes and submerged leaves of Schoenoplectus subterminalis

Figure 3. Spikes and submerged leaves.
An occurrence map of Schoenoplectus subterminalis in Renfrew County

Figure 4. Occurence map for Renfrew County and surrounding area.
Accession records for specimens from Renfrew County
Accession # Collector Date
CAN 585300 D.F. Brunton 1999-July-21
DAO 251492 T.C. Brayshaw 1965-September-04
CAN 570258, DAO 251491 T.C. Brayshaw 1965-July-31
DAO 251493 W.G. Dore & T.C. Brayshaw 1965-July-20
DAO 251488 M.I. Moore 1964-August-20
DAO 251489 M.I. Moore 1964-July-19
DAO 251490 M.I. Moore 1964-July-05
DAO 251494 M.I. Moore 1962-July-15
CAN 570263 T.C. Brayshaw 1961-October-11
CAN 570261 T.C. Brayshaw 1961-September-02
CAN 570259 T.C. Brayshaw 1960-September-10
DAO 252174 V.D. Vladykov 1952-August-14
DAO 251495 G.W. Stirrett 1948-July-14