. The Canadian field-naturalist. 1979 BRUNTON: PELLAEA IN ALBERTA 293 the Crowsnest Pass, there are no records for this species W of the Continental Divide in Canada. The increase in precipitation on the west side of the divide is dramatic and appears to create unsuitable con- ditions for P. occidentalis, even on sites which seem to be otherwise quite suitable. Outside of the Bow Valley, the Western Cliff-brake is rare in Alberta. Being very inconspicuous, however, it may well have been overlooked. It should be watched for elsewhere in dry valleys along the eastern slopes of the Rocky Mountain
. The Canadian field-naturalist. 1979 BRUNTON: PELLAEA IN ALBERTA 293 the Crowsnest Pass, there are no records for this species W of the Continental Divide in Canada. The increase in precipitation on the west side of the divide is dramatic and appears to create unsuitable con- ditions for P. occidentalis, even on sites which seem to be otherwise quite suitable. Outside of the Bow Valley, the Western Cliff-brake is rare in Alberta. Being very inconspicuous, however, it may well have been overlooked. It should be watched for elsewhere in dry valleys along the eastern slopes of the Rocky Mountains and on cliff areas in the prairie (, the Milk River canyon).. 9 Unpublished and/of new stations A Previously published records "^ (RigBy and Bntlon 1970 I SO 100 Figure 5. Distribution of Pellaea occidentalis in 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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