- Warren Dunes State Park. Lake Twp. North of reclaimed sand mine area,1
- Warren Dunes State Park. Lake Twp. South of Weko Beach near Tanner Creek outlet1
- Warren Dunes State Park. Lake Twp. Trail from Wilson Road to Church Camp.1
- Warren Dunes State Park. Lake Twp. from picnic shelter in woods behind Tower Hill.1
- Warren Dunes State Park. Lake Twp. near I-94 ramp.1
- Warren Dunes State Park. Lake Twp. north from picnic shelter.1
- Warren Dunes State Park. Lake Twp. south of Floral Lane wetland.1
- Warren Sand Dune,1
- Warren Wds1
- Warren Wds,1
- Warren Wds.1
- Warren Woods State Park [ca. 4 miles east of Union pier]1
- [Sawyer] - Cult. at Glenn Dale, MD Expt. Garden, seed collected by W. Pfeiffer 19131
- along Hog Creek in water near St. Joseph.1
- along St. Joseph River near St. Joseph.1
- at S. edge of Eau Claire, Sec. 5, T 6 S, R 12 W,1
- between Shaker Farm Road and the St. Joseph River in Berrien Springs.1
- by State Line Creek. Grand Beach,1
- ca. 0.5 miles NW of Grand Beach, just west of railroad track.1
- ca. 1 1/2 miles N. of Bridgeman, Manley Bros. Sand Mine.1