''Roldana'' also known as groundsel is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of large herbs or sub

shrub A shrub or bush is a small to medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple ...

s from the tribe groundsel tribe within the

sunflower family Asteraceae () is a large family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the order Asterales. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger fam ...

. Most if not all of its members used to be members of a related genus, ''

Senecio ''Senecio'' is a genus of flowering plants in the daisy family (Asteraceae) that includes ragworts and groundsels. Variously circumscribed taxonomically, the genus ''Senecio'' is one of the largest genera of flowering plants. Description Mo ...

''. The species which are native to

Southwest United States The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural region of the United States that includes Arizona and New Mexico, along with adjacent portions of California, Colorado, N ...

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

and

Central America Central America is a subregion of North America. Its political boundaries are defined as bordering Mexico to the north, Colombia to the southeast, the Caribbean to the east, and the Pacific Ocean to the southwest. Central America is usually ...

and naturalized elsewhere. ; Species ; formerly included several species now regarded as better suited to other genera: ''

Trixis ''Trixis'' is a genus of shrubs in the family Asteraceae, native to North and South America including the West Indies. Members of the genus are commonly known as threefolds due to the outer lip of the corolla. The generic name is derived from ...

'' 'Cristobalensis', 'sartorii' and 'oaxacana' are accepted as

varieties Variety may refer to: Arts and entertainment Entertainment formats * Variety (radio) * Variety show, in theater and television Films * ''Variety'' (1925 film), a German silent film directed by Ewald Andre Dupont * ''Variety'' (1935 film), ...

Roldana petasitis ''Roldana petasitis'', also known as the velvet groundsel or Californian geranium,V ...

.Roldana petasitis var. oaxacana (Hemsl.) Funston
Board of Trustees of the Royal Botanic Gardens, Kew Retrieved 12 April 2023.

References

External links

Senecioneae Asteraceae genera Flora of Northern America {{Senecioneae-stub