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Place
- Arizona1
- Arkansas1
- Austin1
- Burro Mts1
- California2
- College1
- Cor. of Montana & New York Sts.1
- Dry bed of Gila River, 30 miles southeast of Phoenix1
- Florida3
- Hattesville1
- Kansas1
- Kennet Square, Experimental Greehouse #21
- Key West1
- Missouri1
- New Mexico1
- North America22
- North end Padre Isl.1
- Oak ridge near Aspalaga1
- Padre Island1
- Pennsylvania1