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Place
- Alpena[remove]420
- Michigan420
- North America415
- USA415
- Middle Island14
- Middle Island.11
- Alpena Twp.7
- Thunder Bay Island.7
- Twin Sinks, Sink #2, near Leer7
- SE of Leer.5
- Near Alpena.4
- Leer, near, Sink #2, twin sinks3
- Long Lake3
- Sink # 1, 3 Sinks, Leer3
- ca. 6.5 mi. W. of Bolton.3
- near Alpena3
- Alpena Twp. At N. end of Huber St. on E. side of town of Alpena.2
- Bolton Sink.2
- Contact UM Herbarium2
- Grass Island (in Thunder Bay near Alpena).2