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    Author(s): Alan B. Curtis
    Date: 2003
    Source: Gen. Tech. Rep. PNW-GTR-571. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 30 p
    Publication Series: General Technical Report (GTR)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (2.36 MB)

    Description

    Horse Rock Ridge Research Natural Area (HRR RNA) was established in June 1995 to protect the best remaining example of a grassy “bald” (treeless area) on the western margin of the Cascade Range and its associated botanical, wildlife, and scenic values. This bald is surrounded by old-growth Pseudotsuga menziesii/Tsuga heterophylla (Douglas-fir/western hemlock) forest in the Coburg Hills on the eastern edge of the Willamette Valley in western Oregon. The site is recognized for its considerable diversity of plant species that includes both Willamette Valley plants as well as plants more often found in the montane zone of the Cascade Range. There are also several species present at the site that are normally found east of the Cascade Range. This guidebook describes the area, environment, biota, disturbance history, research, and access.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Curtis, Alan B. 2003. Horse Rock Ridge Research Natural Area: guidebook supplement 27. Gen. Tech. Rep. PNW-GTR-571. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 30 p

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    Keywords

    Research natural area, vegetation types, vascular plants, lichens, liverworts, mosses, birds, mammals, mollusks, amphibians, reptiles

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