Includes bibliographical references (pages 13-15).
This guidebook describes major biological and physical attributes of the 433-ha (1,070-ac) Grayback Glades Research Natural Area. The area supports high- elevation examples of white fir-Shasta red fir (Abies concolor [Gord. + Glend] - Abies magnifica var. shastensis) forest along the crest of the Siskiyou Mountains in southwestern Oregon. High-elevation Sitka alder (Alnus viridis ssp. sinuata) glades are also represented on the site. Drainages support large individuals of Port Orford cedar (Chamaecyparis lawsoniana [A. Murray bis]).