Brickelliastrum is a genus of in the tribe Eupatorieae within the family Asteraceae.[King, R. M. and H. Robinson. 1972 Studies in the Eupatorieae (Asteraceae) LXXVIII. A new genus, Brickelliastrum. Phytologia 62: 63-64.24(2): 64. 1972.][D.J.N.Hind & H.E.Robinson. 2007. Tribe Eupatorieae In: The Families and Genera of Vascular Plants vol.VIII. (Joachim W.Kadereit & Charles Jeffrey, volume editors. Klaus Kubitzky, general editor). Springer-Verlag. Berlin, Heidelberg.] Its species are Native species to Arizona, New Mexico, and Texas in the United States and to northern Mexico.[
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Brickelliastrum has at times been lumped with Brickellia or Steviopsis, but chromosome number ( x=10) and molecular data are in agreement in showing that it is distinct from either of these.[Schilling, E. E., J. L. Panero, B. S. Crozier & P. Davila. 2013. Relationships of Asanthus (Asteraceae, Eupatorieae). Systematic Botany 38: 253-258.] Despite having the general appearance of Brickellia, members of Brickelliastrum have cypselae that have only 5-7 ribs (vs. 10), funnel-shaped Petal, and a style with an unenlarged, glabrous base.
Species
, Plants of the World Online accepted two species:
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Brickelliastrum fendleri (A.Gray) R.M.King & H.Rob.
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Brickelliastrum nesomii (B.L.Turner) R.M.King & H.Rob., syns. Brickelliastrum villarrealii, Steviopsis nesomii B.L.Turner
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