The genus Carex of Renfrew County:
A comparative study

By Grant A. Bickel, 2020

Carex retrorsa Schwein., Retrorse Sedge (Section VESICARIAE)

Carex retrorsa is common and widespread in Renfrew County. It is found in a wide variety of wetlands. It is known for it retrorse (backward pointing) perigynia.

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Achenes, perigynia and scales of Carex retrorsa

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

Figure 2. Inflorescence.
Habit of Carex retrorsa

Figure 3. Natural setting.
An occurrence map of Carex retrorsa in Renfrew County

Figure 4. Occurence map for Renfrew County and surrounding area.
Accession records for specimens from Renfrew County
Accession # Collector Date
CAN 551703 A. Vogg 1988-August-07
CAN 551550 A. Vogg 1988-July-16
CAN 551516 A. Vogg 1988-June-23
DAO 573969 K.W. Spicer 1988-June-15
CAN 498721 M.J. Shchepanek, A. Dugal & C.A. Campbell 1985-June-14
CAN 497101 A. Vogg & H. Vogg 1983-July-24
CAN 497034 A. Vogg & K. MacDonald 1983-July-17
CAN 496972 A. Vogg 1983-July-09
CAN 496815 A. Vogg & R. Nicholas 1982-September-02
CAN 498555 A. Vogg 1982-June-26
CAN 465377 A. Vogg 1982-June-13
CAN 362592 M.J. Shchepanek, E. Haber & G. Savage 1972-August-31
CAN 570015, DAO 659309 M.I. Moore 1968-August-03
CAN 570020 M.I. Moore & T.C. Brayshaw 1962-June-20
CAN 570017 T.C. Brayshaw 1961-September-19
CAN 570018 T.C. Brayshaw 1960-September-24
CAN 570019 P. von Muellen 1958-September-07
DAO 368727 J.A. Calder 1952-August-6
DAO 368726 H. Lloyd 1946-July-09
DAO 368724 J. Ross 1937
DAO 368728 M.I. Moore