You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Butte Remove constraint Place: Butte Place California Remove constraint Place: California Place Oroville Dam quad. Northern Sierra Nevada Foothills, near west edge of Lake Oroville/North Fork Feather River 6.8 km north of the Spillway Boat Ramp. Remove constraint Place: Oroville Dam quad. Northern Sierra Nevada Foothills, near west edge of Lake Oroville/North Fork Feather River 6.8 km north of the Spillway Boat Ramp.