The genus Carex of Renfrew County:
A comparative study

By Grant A. Bickel, 2020

Carex tonsa (Fern.) Bickn. var rugosperma (Mack.) Crins, Rough-fruited Deep-green Sedge (Section ACROCYSTIS)

Carex tonsa var rugosperma is common on disturbed sandy openings and dry beaches in Renfrew County. It resembles Carex umbellata except that the perigynia of Carex tonsa var rugosperma have a much longer beak. The other recognized variety of Carex tonsa, var tonsa, is not known to be present in Renfrew County.

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Achenes, perigynia and scales of Carex tonsa var rugosperma

Figure 1. Achenes, perigynia and scales.
Terminal and basal inflorescence of Carex tonsa var rugosperma

Figure 2. Terminal and basal inflorescences.
Basal inflorescences of Carex tonsa var rugosperma

Figure 3. Basal inflorescences.
Habit of Carex tonsa var rugosperma

Figure 4. Habit when blooming.
Habit of Carex tonsa var rugosperma

Figure 5. Habit.
An occurrence map of Carex tonsa var rugosperma in Renfrew County

Figure 6. Occurence map for Renfrew County and surrounding area.
Accession records for specimens from Renfrew County
Accession # Collector Date
DAO 671328 P.M. Catling & S.E. Carbyn 1994-June-01
DAO 671331 P.M. Catling & S.E. Carbyn 1994-June-01
DAO 671361 P.M. Catling & S.E. Carbyn 1994-June-01
DAO 671380 S.E. Carbyn 1994-May-28
DAO 668426 S.E. Carbyn 1993-July-07
DAO 668451 P.M. Catling & S.E. Carbyn 1993-June-17
DAO 669067 P.M. Catling & S.E. Carbyn 1993-June-17
DAO 671411 P.M. Catling & S.E. Carbyn 1993-June-17
DAO 671413 P.M. Catling & S.E. Carbyn 1993-June-17
DAO 671415 P.M. Catling & S.E. Carbyn 1993-June-17
DAO 671416 P.M. Catling & S.E. Carbyn 1993-June-17
CAN 525382, DAO 542251 S.J. Darbyshire 1985-June-15
DAO 329050 S. Hay and C. Morisset 1980-August-23
CAN 317244, DAO 835108 R. Beschel & R. Hainault 1966-July-20
DAO 42783 Dore & Brayshaw 1965-July-21
CAN 570090 T.C. Brayshaw 1960-June-08
CAN 570092 T.C. Brayshaw 1959-May-24
CAN 262156 J.S. Rowe 1958-June-26
CAN 570091 A.W.H. Damman 1954-May-21
DAO 298416 A.J. Breitung 1948-July-23
DAO 298411 A.J. Breitung 1948-July-22
DAO 298314 A.J. Breitung 1948-July-20
DAO 298412 A.J. Breitung 1948-July-20
DAO 298413 A.J. Breitung 1948-July-20
CAN 570085 M.I. Moore May-30