Roldana also known as groundsel is a genus of large herbs or subshrubs from the groundsel tribe within the sunflower family.La Llave, Pablo de & Lexarza, Juan José Martinez de. 1825. Novorum Vegetabilium Descriptiones 2: 10Turner, B. L. 2006. A recension of the Mexican species of Roldana (Asteraceae: Senecioneae). Phytologia 87(3): 204–249. Tropicos, Roldana La Llave
Most if not all of its members used to be members of a related genus, Senecio. The species are native to Southwest United States, Mexico and Central America and some are naturalized elsewhere.
Species
formerly included several species now regarded as better suited to other genera: Senecio Trixis
'Cristobalensis', 'sartorii' and 'oaxacana' are accepted as varieties of Roldana petasitis.Roldana petasitis var. cristobalensis (Greenm.) FunstonBoard of Trustees of the Royal Botanic Gardens, Kew Retrieved 12 April 2023.Roldana petasitis var. sartorii (Sch.Bip. ex Hemsl.) Funston Board of Trustees of the Royal Botanic Gardens, Kew Retrieved 12 April 2023.Roldana petasitis var. oaxacana (Hemsl.) Funston Board of Trustees of the Royal Botanic Gardens, Kew Retrieved 12 April 2023.
References
External links