Portland State University. Department of Biology
Robert O. Tinnin
Term of Graduation
Date of Publication
Master of Science (M.S.) in Biology
1 online resource (2, x, 86 pages)
The purposes of this study were to determine if Rhododendron macrophyllum has the potential to inhibit the growth of other species through the production of water-soluble toxins which are leached out of its litter by rainfall, and to determine if this potential is realized in the field. The study was therefore composed of two part: 1) a series of bioassays to determine the presence an activity of water-soluble phytotoxins in R. macrophyllum leaf litter, and 2) a field study to describe vegetational patterns associated with R. macrophyllum in a western Cascades clearcut.
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Clark, Ivan W., "The Allelopathic Potential of Rhododendron macrophyllum in a Western Cascades Clearcut" (1979). Dissertations and Theses. Paper 2766.