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2 headings found for Rydberg, Per Axel
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Rydberg, Per Axel, 1860-1931
![Sudoc [ABES], France](/viaf/images/flags/SUDOC.png "Sudoc [ABES], France")
Per Axel Rydberg Swedish-born U.S. botanist (1860–1931) 
Rydberg, Per Axel 
Per Axel Rydberg 
Rydberg, P.A. (Per Axel), 1860-1931 
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Personal | The American species of Limnorchis and Piperia, north of Mexico The American species of Limnorchis and Piperia, north of Mexico Carduales Ambrosiaceae, Carduaceae Coleochaetaceae, Characeae |
| 2 |
Rydberg, Per Axel, 1860-1931. | Monograph of the North American Potentilleae
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