Reports and documents by IAE staff.  

A morphometric evaluation of Corydalis caseana and its subspecies with special attention to aquae-gelidae

Thomas N. Kaye   2001

A recently discovered population of Corydalis  at Traverse Creek, aka Saddle blanket Mtn. within the Willamette National Forest occurs in Lane County, south of the known range of cold-water corydalis and north of the known range of Sierra corydalis. Individuals in this population resemble cold-water corydalis but also appear intermediate between the two species in […]

Population viability analysis for the clustered lady’s slipper (Cypripedium fasciculatum)

Erin C. gray, et al.   2012

The purpose of this project was to survey populations of clustered lady’s slipper in the Medford District BLM in order to expand on earlier analyses and better model the probability of extinction [Population Viability Analysis (PVA)] for this species. The data collected suggest an ongoing trend of population decline and local extinction. Our data set includes […]

Population trends, demography, and the effects of environment and disturbance on Cypripedium fasciculatum in Southern Oregon

Andrea S. Thorpe, et al.   2011

Cypripedium fasciculatum Kellogg ex S. Watson (clustered lady’s slipper, Orchidaceae) is a rare woodland orchid that can be found in scattered populations throughout northwestern North America. Although several studies have explored its relationship with mycorrhizal fungi and habitat associates, there has been little information on the species’ demography, including determining the likelihood that this species […]

Population biology of Lomatium bradshawii II. Insect interactions, phenology, and breeding systems

Thomas N. Kaye and Melissa Kirkland   1994

Lomatium bradshawii (Bradshaw’s lomatium) is a state and federally listed endangered species that occurs in fragmented native-prairie habitat in western Oregon and southwestern Washington. A U.S. Fish and Wildlife Service recovery plan for the species identifies breeding- system and pollinator-availability research as needed for filling information gaps that could influence recovery efforts. We conducted field […]

Population trends of Lomatium bradshawii before and after prairie fires: 1988- 1997

Thomas N. Kaye   1998

A USFWS recovery plan for L. bradshawii (Parenti et al. 1993) targets population monitoring and enhancement as two actions needed to meet recovery objectives for the species. Population monitoring alone will not contribute to the species’ recovery unless it is combined with rigorous analysis to identify populations at risk and evaluate enhancement techniques. The goal […]

Factors Influencing Germination of a Functionally Important Grassland Plant, Iris tenax

Jones, Katherine and Thomas Kaye   2013

Grassland prairies of western Oregon and Washington are among the most endangered ecosystems in the United States. Active management and restoration are needed to promote biodiversity in the region. To support plant production for use in habitat restoration, we developed germination protocols for greenhouse propagation of Iris tenax (Oregon iris). Dormancy was most effectively overcome […]

Effects of climate change on Kincaid’s lupine

Erin C. Gray, Sarah T. Bois, and Thomas N. Kaye   2013

Kincaid’s lupine (Lupinus oreganus), a rare legume found in prairies and oak savannas, is listed as threatened by the US Fish and Wildlife Service and the Oregon Department of Agriculture, and endangered by the Washington Department of Natural Resources. Extensive land development and alteration in the prairies of western Oregon and southwestern Washington have relegated remaining populations to small, […]