Trixis is a genus of shrubs in the family Asteraceae, native to North and South America including the West Indies.Browne, Patrick. 1756. Civil and Natural History of Jamaica in Three Parts page 312Browne, Patrick. 1756. Civil and Natural History of Jamaica in Three Parts plate 33, figure 1 on left engraved black + white illustration
Members of the genus are commonly known as threefolds due to the outer lip of the corolla. The generic name is derived from (), the Greek word for 'threefold'.Flora of North America Vol. 19, 20 and 21 Page 75, Threefold, Trixis P. Browne, Civ. Nat. Hist. Jamaica. 312, plate 33, fig. 1. 1756.
SpeciesBiota of North America Program 2013 county distribution maps Trixis aggregata Rusby - Bolivia Trixis alata D.Don - Guerrero, México State, Guanajuato Trixis angustifolia DC. - San Luis Potosí Trixis anomala B.L.Turner - Chiapas Trixis antimenorrhoea (Schrank) Mart. ex Baker - South America Trixis bowmanii Baker - Brazil Trixis cacalioides (Kunth) D.Don - Peru Trixis calcicola B.L.Rob. - Guerrero Trixis californica Kellogg – American threefold - USA (CA AZ NM TX), Mexico (Baja California, Baja California Sur, Sonora, Chihuahua, Coahuila, Durango, Zacatecas, Nuevo León) Trixis chiapensis C.E.Anderson - Guatemala, Chiapas Trixis erosa Sw. - Costa Rica, West Indies Trixis glaziovii Baker - Paraná, Rio de Janeiro Trixis grandibracteata C.E.Anderson - Guerrero Trixis grisebachii Kuntze - Bolivia, northern Argentina Trixis haenkei Sch.Bip. - Durango, Sinaloa Trixis hassleri Chodat - Paraguay Trixis hyposericea S.Wats. - Jalisco, Michoacán, Nayarit Trixis inula Crantz – Tropical threefold - USA (TX), Mexico, Central America, West Indies, Colombia, Venezuela Trixis lessingii DC. - Paraguay, Uruguay, Brazil Trixis longifolia D.Don - México State, Sinaloa Trixis megalophylla Greenm. - México State, Oaxaca, Puebla Trixis mexicana Lex. - Michoacán Trixis michuacana Lex. - Michoacán, Jalisco, Nayarit Trixis nelsonii Greenm. - Guatemala, Chiapas, Oaxaca Trixis nobilis (Vell.) Katinas - Paraguay, Uruguay, Brazil, Argentina Trixis ophiorhiza Gardner - Bolivia, Brazil Trixis pallida Less. - Paraguay, Uruguay, Brazil, Argentina Trixis parviflora C.E.Anderson - Oaxaca Trixis peruviana Katinas - Peru Trixis praestans (Vell.) Cabrera - Paraguay, Uruguay, Brazil, Argentina Trixis pringlei B.L.Rob. & Greenm. - Guerrero, Oaxaca Trixis proustioides Hieron. - Colombia Trixis pterocaulis B.L.Rob. & Greenm. - Colima, Jalisco, Nayarit, Sinaloa, Sonora Trixis silvatica B.L.Rob. & Greenm. - Oaxaca Trixis spicata Gardner - Paraguay, Uruguay, Brazil Trixis thyrsoidea Dusén ex Malme - southern Brazil Trixis vauthieri DC. - eastern Brazil Trixis verbascifolia (Gardner) S.F.Blake - Minas Gerais, Rio de Janeiro Trixis villosa (Spreng.) Sch.Bip. - Brazil
Formerly included Numerous species once included in Trixis but now considered better suited to other genera: Acourtia Clibadium Dolichlasium Holocheilus Perezia Riencourtia
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