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Creator:: Clark, Deborah Louise, 1950-, Finley, Karen K., and Ingersoll, Cheryl A.
Abstract:: Erigeron decumbens var. decumbens, the Willamette daisy, is known only from the Willamette Valley of Oregon. Herbarium records, from the 1800's until 1934, indicate that the Willamette daisy was once common and widely distributed throughout the Willamette Valley (Clark et al. 1993). However, between 1934 and 1980, this taxon was...
Resource Type:: Technical Report
Full Text:: , AN ENDANGERED PLANT OF THE WILLAMETTE VALLEY Prepared by Deborah L. Clark Karen K. Finley Dr

Creator:: Ingersoll, Cheryl A., Finley, Karen K., and Clark, Deborah Louise, 1950-
Abstract:: Erigeron decumbens var. decumbens, the Willamette Daisy, is endemic to the Willamette Valley of Oregon. This taxon is a Category 1 Candidate for listing under the federal Endangered Species Act (U.S. Fish and Wildlife Service 1990) and is listed as Endangered under Oregon state law. Herbarium records indicate that E....
Resource Type:: Technical Report
Full Text:: . DECUMBENS, 1993-1994 FIELD STUDIES Prepared by Dr. Cheryl A. Ingersoll Karen K. Finley Deborah L. Clark

Creator:: Wilson, Mark V., Ingersoll, Cheryl A., and Clark, Deborah Louise, 1950-
Abstract:: Seed size, abundance, viability, dormancy, and germination requirements strongly influence plant establishment and therefore are important considerations in restoration of native vegetation. These characteristics provide criteria for selection of suitable species, development of collection and pretreatment methods, and determination of seeding densities. The first set of objectives of this study...
Resource Type:: Technical Report
Full Text:: Mark V. Wilson, Cheryl A. IngersolIr. and Deborah L. Clark Oregon State University Corvallis, Oregon

Creator:: Wilson, Mark V., Ingersoll, Cheryl A., Clark, Deborah Louise, 1950-, and Wilson, Mark G.
Abstract:: Explaining restoration failure can be as important as touting success. We used a series of studies to understand the failure of techniques commonly used to restore wetland prairies in the Willamette Valley of western Oregon. Burning, fallowing, and solarization (covering tilled plots with plastic sheeting to heat the soil) had...
Resource Type:: Article
Full Text:: . Deborah L. Clark is a research associate at Oregon State University. Her research focuses on the

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