Published in Contributions from the University of Michigan Herbarium, in 1990, in volume 17, pages 7-19
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 21-37
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 39-54
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 55-69
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 71-81
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 83-91
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 93-97
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 99-131
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 133-137
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 139-162
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 163-171
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 173-182
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 215-222
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 223-265
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 267-278
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Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 279-293
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Published in Contributions from the University of Michigan Herbarium, in 1990, in volume 17, pages 295-306
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Published in Contributions from the University of Michigan Herbarium, in 1990, in volume 17, pages 307-312
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Published in Contributions from the University of Michigan Herbarium, in 1990, in volume 17, pages 313-325
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