Published in DORIANA, in 1971, in volume 4, issue 198, pages 1-3
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Published in Journal of The Arnold Arboretum, in 1959, in volume 40, issue 3, pages 221-259
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Published in Botanical Museum Leaflets, Harvard University, in 1949, in volume 14, issue 4, pages 1-20
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Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 142-144
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Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 2, pages 165-203
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Published in Journal of The Arnold Arboretum, in 1977, in volume 58, issue 3, pages 280-306
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Published in Botanical Museum Leaflets, Harvard University, in 1952, in volume 15, pages 191-200
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Published in Botanical Museum Leaflets, Harvard University, in 1954, in volume 16, pages 229-240
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Published in Palaeontology, in 1983, in volume 26, issue 1, pages 1-32
Created: 2016-04-23, modified: 2016-04-23
Published in Journal of The Arnold Arboretum, in 1963, in volume 44, issue 3, pages 328-376
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Published in Journal of The Arnold Arboretum, in 1978, in volume 59, issue 1, pages 1-31
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Published in Botanical Museum Leaflets, Harvard University, in 1965, in volume 21, pages 37-57
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Published in Atti Della Societa Italiana Di Scienze Naturali E Del Museo Civico Di Storia Naturale In Milano, in 1980, in volume 121, issue 3, pages 211-220
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Published in Botanical Museum Leaflets, Harvard University, in 1978, in volume 26, pages 237-255
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Published in Botanical Museum Leaflets, Harvard University, in 1984, in volume 30, issue 1, pages 1-62
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