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Place
- SE Decatur.1
- Saint Clair1
- Saline16
- Sangamon1
- Sec 3, Fairview Twp.1
- Shawnee (NF), at Stone Face, SE of Harrisburg.1
- Shawnee Nat'l Forest, about 7 mi ESE of Harrisburg.1
- Shawnee National Forest, about 7 miles ESE of Harrisburg.2
- Sheffield.1
- Shelby4
- Shoal Creek Nature Preserve, ca 2 miles NE of Litchfield.1
- South Park, Quincy1
- South of Effingham, 0.6 mile north of 1000N along west side of railroad 5 acre prairie. Effingham South 7.5 minute quadrangle.1
- South of Palatine.1
- South of Spring Bay.1
- Spring Lake.1
- St 45 N95th St.1
- Stark24
- Starved Rock State Park, west of South Ottawa, ridge slope (north-facing) between branches of Tonti Canyon, Starved Rock 7.5' quadrangle, south side of IL Rt 71, south of Illinois River.1
- 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.1