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Published in Madroño, in 1968, in volume 19, issue 7, pages 283-286

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Published in Sida, Contributions To Botany, in 1995, in volume 16, issue 3, pages 427-437

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Published in Sida, Contributions To Botany, in 2003, in volume 20, issue 3, pages 885-889

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Published in Madroño, in 1981, in volume 28, issue 2, pages 86-90

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Published in Bulletin of The British Ornithologists' Club, in 2003, in volume 123, issue 4, pages 210

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Published in Phytologia, in 1992, in volume 72, pages 40-41

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Published in Phytologia, in 1988, in volume 64, pages 390-398

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Published in Sida, Contributions To Botany, in 1999, in volume 18, issue 4, pages 987-999

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Published in Phytologia, in 1972, in volume 24, issue 1, pages 15-18

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Published in Madroño, in 1946, in volume 8, issue 6, pages 206-208

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Published in Zoologica, in 1953, in volume 38, issue 6, pages 97-104

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