The genus Carex of Renfrew County:
A comparative study

By Grant A. Bickel, 2020

Carex deweyana Schwein., Dewey’s Sedge (Section DEWEYANAE)

Carex deweyana is a common woodland species of Renfrew County. The perigynia of Carex deweyana are so distinctive that it is unlikely to be confused with any other Carex species in Renfrew County.

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Achenes, perigynia and scales of Carex deweyana

Figure 1. Achenes, perigynia and scales.
Inflorescence of Carex deweyana

Figure 2. Inflorescence.
Inflorescence of Carex deweyana

Figure 3. Inflorescence.
An occurrence map of Carex deweyana in Renfrew County

Figure 4. Occurence map for Renfrew County and surrounding area.
Accession records for specimens from Renfrew County
Accession # Collector Date
DAO 586201 K.W. Spicer 1989-July-06
CAN 551502 A. Vogg 1988-July-03
CAN 528472 M.J. Shchepanek, A.W. Dugal & L.M. Ley 1987-July-16
CAN 498238 A. Vogg 1984-August-04
CAN 487152 S.J. Darbyshire 1983-July-03
CAN 466132 A. Vogg 1982-June-17
CAN 468812 S.J. Darbyshire 1982-June-13
CAN 569874 M.I. Moore 1974-September-04
CAN 569871 M.I. Moore 1968-May-31
DAO 800961, DAO 847006 M.I. Moore 1966-June-29
DAO 846966 M.I. Moore 1966-June-23
DAO 264215 J.M. Gillett 1961-July-25