Roldana Explained

Roldana also known as groundsel is a genus of large herbs or subshrubs from the tribe groundsel tribe within the sunflower family.^{[1] [2] [3]}

Most if not all of its members used to be members of a related genus, Senecio. The species which are native to Southwest United States, Mexico and Central America and naturalized elsewhere.^{[4] [5]}

Species

formerly includedseveral species now regarded as better suited to other genera: Senecio Trixis

'Cristobalensis', 'sartorii' and 'oaxacana' are accepted as varieties of Roldana petasitis.^{[6] [7] [8]}

Notes and References

1. La Llave, Pablo de & Lexarza, Juan José Martinez de. 1825. Novorum Vegetabilium Descriptiones 2: 10
2. https://www.biodiversitylibrary.org/page/12995396#page/68/mode/1up Turner, B. L. 2006. A recension of the Mexican species of Roldana (Asteraceae: Senecioneae). Phytologia 87(3): 204–249.
3. http://www.tropicos.org/Name/40026700 Tropicos, Roldana La Llave
4. Funston . A. Michele . 230. Roldana La Llave . . 20 . Page 542,620 .
5. Web site: ROLDANA . 2008-05-23 . Flora of Australia Online .
6. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77095585-1 Roldana petasitis var. cristobalensis (Greenm.) Funston
7. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77095587-1 Roldana petasitis var. sartorii (Sch.Bip. ex Hemsl.) Funston
8. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77095586-1 Roldana petasitis var. oaxacana (Hemsl.) Funston