Accepted By:
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Bailey, L.H. & E.Z. Bailey. 1976. Hortus Third i–xiv, 1–1290. MacMillan, New York.
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Pruski, J. F. 2018. Compositae of Central America-VII. Digitacalia, Dresslerothamnus, Pentacalia, Zemisia, their microcharacters, and some other Senecioneae. Phytoneuron 2018–53: 1–112.
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Pruski, J. F. 2021. Studies of Neotropical Compositae–XV. The new genus Chaetacalia, retention of Aetheolaena, Culcitium, Haplosticha, and Iocenes, two new species of Senecio, and Lasiocephalus revisited again (Senecioneae: Senecioninae). Phytoneuron 2021-65: 1–83, f. 1-39.
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