laevigatus, Helianthus longifolius, Helianthus maximiliani, Helianthus microcephalus, Helianthus mollis, Helianthus neglectus, Helianthus niveus, Helianthus
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Bot. 2: 200. 1937. David J. Bogler Introduced Basionym: Achyrophorus microcephalus Schultz-Bipontinus Jahresber. Pollichia 16–17: 59. 1859 Treatment appears
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Heliantheae) subtribe Helianthinae genusHelianthus speciesHelianthus microcephalus Torrey & A. Gray Fl. N. Amer. 2: 329. 1842. Edward E. Schilling Common
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EndemicConservation concern Basionym: Haplopappus microcephalus Cronquist Madroño 11: 186. 1951 Synonyms: Tonestus microcephalus (Cronquist) G. L. Nesom & D. R. Morgan
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found in the southern Blue Ridge Province. It is distinguished from H. microcephalus, with which it shares relatively small heads, by glabrous or sparsely
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he could not rule out the possibility that it might be a hybrid of H. microcephalus and H. strumosus. It may also be an extreme variant of H. strumosus that
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represent a polyploid form of H. divaricatus. Natural hybrids with H. microcephalus have been named H. glaucus Small (D. M. Smith and A. T. Guard 1958).
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