Senecio is a genus of flowering plants in the daisy family (Asteraceae) that includes ragworts and groundsels.
Senecioneae is the largest tribe of the Asteraceae, or the sunflower family, comprising over 150 genera and over 3,500 species. Almost one-third of the species in this tribe are placed in the genus Senecio. Its members exhibit probably the widest possible range of form to be found in the entire plant kingdom, and include annuals, minute creeping alpines, herbaceous and evergreen perennials, shrubs, climbers, succulents, trees, and semi-aquatic plants.
Othonna is a genus of approximately 90 species of succulent or subsucculent perennial herbs or shrubs, with its center of diversity in the Greater Cape Floristic Region (GCFR) of South Africa but some species' ranges include southern Namibia, Angola, and Zimbabwe. The genus was established by Linnaeus in 1753 containing 14 species, however, of those original species, only four are still retained in Othonna, while the others have been transferred to different genera including Cineraria, Euryops, Hertia, Ligularia, Senecio, and Tephroseris. The genus Othonnna is known to be monophyletic. In 2012, a new genus Crassothonna B. Nord. was erected with 13 species transferred from Othonna. A complete modern taxonomic treatment of the genus is being undertaken by the Compton Herbarium and the South African National Biodiversity Institute. The first part, a revision of the Othonnna bulbosa group, was published in 2019.
Crassothonna clavifolia is a species of flowering plant in the family Asteraceae. It is found only in Namibia. Its natural habitat is rocky areas. It is threatened by habitat loss.
Lomanthus fosbergii, synonym Talamancalia fosbergii, is a species of flowering plant in the family Asteraceae endemic to Ecuador. Its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss. It was first described by José Cuatrecasas in 1953 as Senecio fosbergii. The genus Lomanthus is placed in the tribe Senecioneae.
Calenduleae is a flowering plant tribe of the family Asteraceae. Calenduleae has been widely recognized since Alexandre de Cassini in the early 19th century. There are eight genera and over 110 species, mostly found in South Africa.
Rune Bertil Nordenstam is a Swedish botanist and professor emeritus at the Swedish Museum of Natural History in the Department of Phanerogamic Botany. He has worked with Colchicaceae, Senecioneae and Calenduleae, was the editor of Compositae Newsletter newsletter since 1990, and is a Tribal Coordinator for The International Compositae Alliance with responsibility for the tribes Calenduleae and Senecioneae.
Antillanthus is a genus of the tribe Senecioneae in the family Asteraceae described as a genus in 2006. Many members of this genus were previously listed as Pentacalia and Senecio.
Acrisione is a genus of the tribe Senecioneae and the family Asteraceae and a native of Chile, described as a genus in 1985. There is only one known species, Acrisione denticulata.
Elekmania is a genus of the tribe Senecioneae and the family Asteraceae.
Jessea is a genus of Central American plants in the tribe Senecioneae within the sunflower family, closely related to Senecio.
Crassothonna capensis, also known as little pickles (USA), ruby necklace (Australia), Cape aster, Cape Othonna, and Bobbejaankool (Afrikaans), is a species of the genus Crassothonna previously (Othonna) in the family Asteraceae, and is a native of the Eastern Cape of South Africa. It is a native highveld species that originates from the southern Drakensberg region.
Pieter B. Pelser is a lecturer in Plant Systematics and the curator of the herbarium at the University of Canterbury in Christchurch, New Zealand. One research interest is the evolutionary history of the tribe Senecioneae, one of the largest tribes in the largest family of flowering plants. He wrote the most recent attempt to define and delimit this tribe and its problematic founding species Senecio. He also studies insects that eat these plants (Longitarsus) which contain pyrrolizidine alkaloids and what makes them choose which plants they eat.
Dolichoglottis is a genus of flowering plants in the daisy family, Asteraceae.
Lordhowea insularis is a species of flowering plants in the groundsel tribe within the daisy family. It is endemic to Australia's Lord Howe Island in the Tasman Sea.
Scapisenecio pectinatus, synonym Senecio pectinatus, commonly known as alpine groundsel, is a species of flowering plant in the aster family. The species occurs in alpine areas of south-eastern Australia in peat-based soils. It has divided leaves forming a basal rosette and produces a single yellow flower head on a stalk up to 20 cm high.
Lordhowea velleioides, synonym Senecio velleioides, is a species of flowering plant in the family Asteraceae. It is commonly known as forest groundsel.
Caputia is a small genus of flowering plants in the family Asteraceae, native to South Africa. It may be of hybrid origin. Species in this genus were formerly considered part of the genus Senecio.
Lomanthus is a genus of flowering plant in the family Asteraceae, with species native to northwestern Argentina, Bolivia, Ecuador and Peru. The genus was established in 2009. It was segregated from Senecio on the basis of morphological and molecular phylogenetic evidence. It is placed in the tribe Senecioneae.
Scapisenecio is a genus of flowering plant in the family Asteraceae, native to south-eastern Australia, particularly Tasmania. The genus was established in 2020.
