Robert D. Brettell

Sinacalia is a genus of Chinese plants in the groundsel tribe within the daisy family. Species Sinacalia caroli (C.Winkl.) C.Jeffrey & Y.L.Chen - Gansu, Sichuan Sinacalia davidii (Franch.) H.Koyama - Shaanxi, Sichuan, Tibet, Yunnan Sinacalia macrocephala (H.Rob. & Brettell) C.Jeffrey & Y.L.Chen - Hubei Sinacalia tangutica (Maxim.) B.Nord - Gansu, Hebei, Henan, Hubei, Hunan, Ningxia, Qinghai, Shaanxi, Shanxi, Sichuan

Telanthophora is a genus of Mesoamerican plants in the groundsel tribe within the daisy family. Species Telanthophora arborescens (Steetz) H.Rob. & Brettell - Panamá, El Salvador, Costa Rica, Mexico (Oaxaca, Veracruz) Telanthophora bartlettii H.Rob. & Brettell - Belize Telanthophora cobanensis (J.M.Coult.) H.Rob. & Brettell - Mexico (Oaxaca, Chiapas), Guatemala, Belize, El Salvador, Honduras, Nicaragua Telanthophora grandifolia (Less.) H.Rob. & Brettell - Mexico (Veracruz, Oaxaca, Chiapas), Guatemala, Belize, El Salvador, Honduras, Nicaragua, Costa Rica, Panamá Telanthophora serraquitchensis

Pseudonoseris is a genus of South American plants in the tribe Liabeae of the family Asteraceae. Species Pseudonoseris discolor (Muschl.) H.Rob. & Brettell - Peru, Bolivia Pseudonoseris glandulosa (Hieron.) Pruski - Peru Pseudonoseris striatum (Cuatrec.) H.Rob. & Brettell - Peru Pseudonoseris szyszylowiczii (Hieron.) H.Rob. & Brettell - Peru

Psacaliopsis is a genus of Mexican plants in the groundsel tribe within the daisy family. Species Psacaliopsis macdonaldii (B.L.Turner) C.Jeffrey - Oaxaca Psacaliopsis paneroi (B.L.Turner) C.Jeffrey - Oaxaca Psacaliopsis purpusii (Greenm. ex Brandegee) H.Rob. & Brettell - Oaxaca formerly included see Roldana Senecio Psacaliopsis pinetorum (Hemsl.) Funston & Villaseñor - Roldana pinetorum (Hemsl.) H.Rob. & Brettell Psacaliopsis pudica (Standl. & Steyerm.) H.Rob. & Brettell - Senecio nubivagus L.O.Williams

Pittocaulon is a genus of Mexican shrubs and small trees in the tribe Senecioneae within the family Asteraceae. Pittocaulon is native to the dry parts of central and southern Mexico. In addition to the strange appearance of these plants, Pittocaulon is of interest due to the remarkable range of habitats in which the species occur, from dry highland scrub well above 3000 meters, to tropical dry forest in hot country as low as 300 meters and on rocks, often in very steep situations. Pittocaulon species are conspicuous when they flower at the end of the dry season are popularly called "palo

Liabeae is a tribe in the plant family Asteraceae. It is endemic to the Neotropics, where it is most diverse in the northern and central Andes. The center of diversity is in Peru. This tribe includes annual and perennial herbs, shrubs, lianas, and small trees. In general, plants of the tribe have oppositely arranged leaves and almost all have yellow ray and disc florets, while a few have red or white florets. Most contain a white latex. The fruit usually has a pappus with an outer layer of scales and an inner layer of bristles. Most species occur in forests. Some can be found in desert,

Ferreyranthus is a genus of South American flowering plants in the family Asteraceae. Species

Roldana petasitis, also known as the velvet groundsel or Californian geranium, is a species of the genus Roldana and family Asteraceae that used to be classified in the genus Senecio. It is native to Central America.

Nelsonianthus is a genus of flowering plants belonging to the family Asteraceae. It is native to southern Mexico and Guatemala. The genus name of Nelsonianthus is in honour of Edward William Nelson (1855–1934), an American naturalist and ethnologist. It was first described and published in Phytologia Vol.27 on page 54 in 1973.

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Barkleyanthus is a monotypic genus of flowering plants in the aster family, Asteraceae, containing the single species Barkleyanthus salicifolius, a plant formerly classified in the genus Senecio. It is native to North and Central America, where its distribution extends from the southwestern United States to El Salvador. Its common names include willow ragwort, willow groundsel, Barkley's-ragwort, and jarilla. This plant is a shrub producing a branching stem usually about one to two meters tall, but known to exceed 4 meters at times. The leaves are roughly lance-shaped and are alternately

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Pittocaulon praecox is the type species for the genus Pittocaulon and family Asteraceae. This species also has the widest range of the genus.

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Munnozia pinnatipartita is a species of flowering plant in the family Asteraceae. It is found only in Ecuador. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests. It is threatened by habitat loss.

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