Chryselium, a New South American Genus Segregated from Helichrysum (Asteraceae, Gnaphalieae)

FREIRE, S. E.; URTUBEY E.

SYSTEMATIC BOTANY

AMER SOC PLANT TAXONOMISTS

Lugar: Laramie; Año: 2019 vol. 44 p. 233 - 242

0363-6445

a new monotypic genus, is here described and illustrated to accomodate one species that was initially placed in Helichrysum, H. gnaphalioides, as Chryselium gnaphalioides. The new genus Chryselium, is a monoecious herb with single stems and terminal capitulescences that are densely glomerulate from the Tropical Andes of Venezuela, Colombia, Ecuador, Bolivia, and Peru. This genus differs fundamentally from Helichrysum by having a stoloniferous habit and corollas with purple apices. A molecular analysis using DNA sequences from nuclear (ITS and ETS) markers placed this genus in a clade with Chevreulia, Cuatrecasasiella, Antennaria, and Diaperia in the FLAG group. Affinities of the new genus with other genera are also discussed.