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Helianthus schweinitzii
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Helianthus
schweinitzii
Torr. & A. Gray
Published In:
A Flora of North America: containing . . . 2(2): 330. 1842. (
Fl. N. Amer.
)
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Helianthus schweinitzii Torr. & A. Gray
Matthews, C., T. Stich, J. Howard & J. Matthews. 1995. Tetraploidy and population characteristics of the federally endangered Schweinitz's funflower, Helianthus schweinitzii. ASB Bull. 42: 166.
94-95
68
Helianthus schweinitzii Torr. & A. Gray
Matthews, J. F., L. S. Barden & C. R. Matthews. 1997. Corrections of chromosome number distribution and misidentifications of the federally endangered sunflower, Helianthus schweinitzii T. & G. J. Torrey Bot. Soc. 124: 198–209.
96-97
68