You searched for: Place Starved Rock State Park, west of South Ottawa, upper Tonto Canyon, Starved Rock 7.5' quadrangle. North side of IL Rt 71, south of Illinois River. Remove constraint Place: Starved Rock State Park, west of South Ottawa, upper Tonto Canyon, Starved Rock 7.5' quadrangle. North side of IL Rt 71, south of Illinois River. Topic Cyperaceae Remove constraint Topic: Cyperaceae