Description: Mt. Pisgah just southeast of Eugene, Lane County, OR. This annual plant has become so numerous and widespread in savannas, woodlands and forests of the Willamette Valley over the last 10-15 years that land manager's treat only incipient populations. Established populations cannot be treated. Here it forms almost a continuous carpet in Oregon White Oak riparian woodland.
Image type: Field
Image location: Mt. Pisgah, Oregon, United States
Specimen in collection: No
Name: Bruce Newhouse
Country: United States