Published in Annals of the Missouri Botanical Garden, in 1949, in volume 36, pages 475-477

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Published in Annals of the Missouri Botanical Garden, in 1951, in volume 38, pages 207-259

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Published in Annals of the Missouri Botanical Garden, in 2006, in volume 93, issue 2, pages 178-208

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Published in Rhodora, in 1966, in volume 68, issue 776, pages 518-519

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Published in Bulletin of the British Museum (Natural History). Historical Series, in 1990, in volume 18, issue 1, pages 25-113

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Published in Rhodora, in 1964, in volume 66, pages 406-07

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Published in Phytologia, in 1974, in volume 27, issue 6, pages 440

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Published in Rhodora, in 1976, in volume 78, pages 761-766

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Published in Rhodora, in 1965, in volume 66, issue 767, pages 278-279

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Published in Rhodora, in 1963, in volume 65, issue 761, pages 50-55

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Published in Journal of The Arnold Arboretum, in 1973, in volume 54, issue 2, pages 309-314

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Published in Contributions From The University of Michigan Herbarium, in 1972, in volume 9, issue 4, pages 359-484

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Published in Novon, in 1994, in volume 4, pages 151

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