Author:Per Axel Rydberg
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Works
[edit]- 1895: Flora Of The Sand Hills Of Nebraska
- 1897: A Report Upon the Grasses and Forage Plants of the Rocky Mountain Region with C. L. Shear
- 1898: A Monograph of the North American Potentilleae
- 1900: Catalogue of the Flora of Montana and the Yellowstone National Park
- 1906: Flora of Colorado
- 1917: Flora of the Rocky Mountains and Adjacent Plains
- 1918: Monograph on Rosa
- 1923: Flora of the Black Hills of South Dakota
- 1923: Memories from the Department of Botany of Columbia University
- 1932: Flora of the Prairies and Plains of Central North America with M. A. Howe
Some or all works by this author are in the public domain in the United States because they were published before January 1, 1929.
This author died in 1931, so works by this author are in the public domain in countries and areas where the copyright term is the author's life plus 92 years or less. These works may be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.
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