. The Canadian field-naturalist. 122 The Canadian Field-Naturalist Vol. 93. B 0 10 0 10 20 30 0 10 20 30 40 50 60 70 80 O 98301250 (GSC 1516) POLLEN PERCENTAGES )X<=i 0D< CO UJ 10 20 30 0 lO O 10 20 â CHARCOAL POLLEN ZONES. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club

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