Indicator Species of Forested Plant Associations on National Forests of Northwestern Washington (Google eBook)

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USDA Forest Service, Pacific Northwest Region, 1992 - Forest plants - 112 pages
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Page 8 - For example, in the area defined as ecozone 1 0, the Silver Fir Zone is first encountered on modal sites, at about 2700 feet on northeast aspects and at about 3200 feet on southwest aspects.
Page 8 - The distribution of most plant associations are correlated to this pattern; some are more abundant in wetter ecozones, while others occur much more frequently in the drier ecozones.
Page 8 - The map of ecozones can be used to interpret a broad moisture-related environmental pattern across the Forest.
Page 48 - Flowers: Small, pink, narrow bell-shaped flowers in small clusters from leaf axils; bumblebee pollinated.

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