The genus Carex of Renfrew County:
A comparative study

By Grant A. Bickel, 2020

Carex lacustris Willd., Lake Sedge (Section PALUDOSAE)

Carex lacustris is common in Renfrew County found in most wetland types close to standing water. Sometimes more than two teeth are evident on the beak of the perigynia (see center perigynium in Figure 1).

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Achenes, perigynia and scales of Carex lacustris

Figure 1. Achenes, perigynia and scales.
Lateral spike of Carex lacustris

Figure 2. Portion of lateral pistillate spike.
Inflorescence of Carex lacustris

Figure 3. Inflorescence.
Inflorescence of Carex lacustris

Figure 4. Inflorescence.
Flowering inflorescence of Carex lacustris

Figure 5. Flowering inflorescence.
Habit of Carex lacustris

Figure 6. Habit.
An occurrence map of Carex lacustris in Renfrew County

Figure 7. Occurence map for Renfrew County and surrounding area.
Accession records for specimens from Renfrew County
Accession # Collector Date
CAN 496929 A. Vogg, S. Morgan & K. MacDonald 1982-July-18
CAN 496907 A. Vogg 1982-July-17
CAN 569941 M.I. Moore 1971-June-30
CAN 569943 M.I. Moore & T.C. Brayshaw 1962-June-20
DAO 360147 M.I. Moore 1962-June-20
CAN 569942 T.C. Brayshaw 1962-May-31
DAO 360166 J.A. Calder 1948-June-15