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Authors whose works are in public domain in at least one jurisdiction

List of works by Per Axel Rydberg

A monograph of the North American Potentilleae ⬇️

[Lancaster, Pa.,Press of the New Era Print. Co.]1898. | New York Botanical Garden, LuEsther T. Mertz Library

Catalogue of the flora of Montana and the Yellowstone National Park ⬇️

monograph by Per Axel Rydberg, published in 1900

Catalogue of the flora of Montana and the Yellowstone National Park ⬇️

New York1900

Contributions to the botany of the Yukon Territory ⬇️

New York,1901 | New York Botanical Garden, LuEsther T. Mertz Library

Flora of Colorado ⬇️

Fort Collins, Col., Experiment Station, 1906.

Flora of the Rocky Mountains

book by Per Axel Rydberg

Flora of the Southeastern United States ⬇️

1903 flora by John Kunkel Small

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