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Ageratum rivale Sessé & Moc.
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McVaugh, R. 2000. A guide to relevant scientific names of plants. 7: i–vii, 1–626. In R. McVaugh Bot. Results Sessé & Mociño. Hunt Institute for Botanical Documentation, Pittsburgh.
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Pectis berlandieri var. palmeri A. Gray
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Turner, B. L. 1996. The comps of Mexico: A systematic account of the family Asteraceae, vol. 6. Tageteae and Anthemideae. Phytologia Mem. 10: i–ii, 1–22, 43–93.
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Pectis capillaris var. paucicapitata Fernald
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Turner, B. L. 1996. The comps of Mexico: A systematic account of the family Asteraceae, vol. 6. Tageteae and Anthemideae. Phytologia Mem. 10: i–ii, 1–22, 43–93.
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Pectis taliscana Hook. & Arn.
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Turner, B. L. 1996. The comps of Mexico: A systematic account of the family Asteraceae, vol. 6. Tageteae and Anthemideae. Phytologia Mem. 10: i–ii, 1–22, 43–93.
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