The genus Eleocharis of Renfrew County:
A comparative study

By Grant A. Bickel, 2020

Eleocharis obtusa (Willdenow) Schultes, Blunt spikerush

Eleocharis obtusa is common in Renfrew County. It grows as large clumps of soft culms (reminiscent of garden chives) in sandy wetlands and emergent shorelines.

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Inflorescence, achenes, scales and basal sheaths of Eleocharis obtusa

Figure 1. Inflorescence, achenes, scales and basal sheaths.
Habit of Eleocharis obtusa

Figure 2. Habit.
An occurrence map of Eleocharis obtusa in Renfrew County

Figure 3. Occurence map for Renfrew County and surrounding area.
Accession records for specimens from Renfrew County
Accession # Collector Date
CAN 551560 A. Vogg 1988-July-16
CAN 497290 A. Vogg 1983-September-17
CAN 497269 A. Vogg 1983-August-20
CAN 437346 H.L. Dickson & H.R. Hainault 1977-August-25
CAN 570166 T.C. Brayshaw 1960-September-19
CAN 570161 T.C. Brayshaw 1960-September-17
CAN 570159 T.C. Brayshaw 1956-October-01
CAN 570160 T.C. Brayshaw