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Haplopappus sect. Asiris H.M. Hall
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Flora of North America Editorial Committee. 2006. Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. 20: i–xxii, 1–666. In Fl. N. Amer.. Oxford University Press, New York.
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Haplopappus sect. Ericameria (Nutt.) A. Gray
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Flora of North America Editorial Committee. 2006. Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. 20: i–xxii, 1–666. In Fl. N. Amer.. Oxford University Press, New York.
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Haplopappus sect. Macronema (Nutt.) A. Gray
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Flora of North America Editorial Committee. 2006. Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. 20: i–xxii, 1–666. In Fl. N. Amer.. Oxford University Press, New York.
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Haplopappus sect. Stenotopsis (Rydb.) H.M. Hall
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Flora of North America Editorial Committee. 2006. Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. 20: i–xxii, 1–666. In Fl. N. Amer.. Oxford University Press, New York.
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