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Published in Botanical Gazette, in 1892, in volume 17, issue 10, pages 330

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Published in Rhodora, in 1956, in volume 58, issue 687, pages 72

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Published in Rhodora, in 1964, in volume 66, issue 766, pages 97-99

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Published in Phytologia, in 1965, in volume 12, pages 369-400

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