The genus Schoenoplectus of Renfrew County:
A comparative study

By Grant A. Bickel, 2020

Schoenoplectus acutus (Muhlenberg ex Bigelow) Á. Löve & D. Löve, Hard-stemmed bulrush

Schoenoplectus acutus is common in Renfrew County, found in shallow water of lakes and ponds.

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Spikelets, achenes and scales of Schoenoplectus acutus

Figure 1. Spikelets, achenes and scales.
Inflorescence of Schoenoplectus acutus

Figure 2. Inflorescence.
Inflorescence of Schoenoplectus acutus

Figure 3. Inflorescence.
Inflorescence of Schoenoplectus acutus

Figure 4. Inflorescence.
Comparison of stem cross sections from S. acutus and S. tabernaemontani

Figure 5. Comparison of stem cross section: S. acutus (left) and S. tabernaemontani (right).
An occurrence map of Schoenoplectus acutus in Renfrew County

Figure 6. Occurence map for Renfrew County and surrounding area.
Accession records for specimens from Renfrew County
Accession # Collector Date
DAO 593444 D.F. Brunton 1987-August-26
CAN 570268 T.C. Brayshaw & M.I. Moore 1966-July-17
CAN 570269 T.C. Brayshaw 1966-July-16
DAO 138962 A.J. Breitung 1948-July-31