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Rubiaceae Juss.

Madder Family

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Family Overview

Rubiaceae Juss., the Madder Family, is one of the largest families of flowering plants and one of the principal evolutionary radiations within Gentianales. Tree TSAR currently recognizes 604 accepted generic entities and approximately 14,000 species. The corrected 2024 family-wide scaffold counted 14,181 species, while subsequent specialist work has continued to reshape generic limits without implying an equivalent change in species diversity. Rubiaceae occurs nearly worldwide but reaches its greatest richness in tropical and subtropical regions, especially humid forests. Familiar members include coffee (Coffea), quinine trees (Cinchona), gardenias (Gardenia), ixoras (Ixora), buttonbushes (Cephalanthus), bedstraws (Galium), and the true madders (Rubia). (Razafimandimbison & Rydin 2024a, 2024b; Kadereit & Schneeweiss 2026)

The Madder Family spans trees, shrubs, lianas, subshrubs, annual and perennial herbs, and a smaller number of epiphytic, creeping, or aquatic forms. Its leaves are usually simple, opposite or whorled, and entire-margined. A particularly useful family character is the presence of stipules between or around the leaf bases; in some herbaceous lineages such as Galium and Rubia, leaf-like stipules contribute to the apparent whorls. Flowers are commonly bisexual, four- or five-merous, and sympetalous, with the petals united into a tube. The ovary is usually inferior. Fruits range from capsules and dry mericarps to berries and drupes, and many lineages show heterostyly or secondary pollen presentation. These combinations of characters make Rubiaceae recognizable even though no single growth form or fruit type defines the family. (Royal Botanic Gardens, Kew 2026a)

Ecologically, Rubiaceae extends from lowland rainforest understories and tropical canopies to savannas, seasonally dry forests, montane vegetation, wetlands, and temperate meadows. Woody tropical lineages account for much of the family’s species richness, but Rubieae provides an important temperate counterpoint: it is the family’s most conspicuously temperate-centered radiation and includes the familiar bedstraws and madders. The family also contains specialized biological interactions, including ant-associated plants, bacterial leaf-nodule symbioses in some lineages, and repeated evolution of heterostylous pollination systems. (Kadereit & Schneeweiss 2026; Royal Botanic Gardens, Kew 2026a)

Modern Classification and a Dynamic Genus Roster

Modern phylogenomics has substantially simplified the highest internal classification of Rubiaceae while revealing considerable complexity below it. Earlier systems variously recognized Cinchonoideae, Ixoroideae, Rubioideae, Antirheoideae, and several smaller subfamilies. The 2024 synthesis by Razafimandimbison and Rydin instead recognized two major subfamilies, Rubioideae and Dialypetalanthoideae, while leaving Acranthereae, Coptosapelteae, and Luculieae outside either subfamily. Dialypetalanthoideae absorbs the traditional core Cinchonoideae and Ixoroideae together with several other historical subfamily concepts. The accompanying corrigendum brought the structural framework to 72 formal tribes: 30 in Rubioideae, 39 in Dialypetalanthoideae, and three unplaced to subfamily. (Razafimandimbison & Rydin 2024a, 2024b)

Tree TSAR uses that 72-tribe framework as a structural scaffold but does not freeze the 2024 genus roster. Its 604-genus treatment incorporates specialist revisions through 2026 and preserves unresolved placements rather than forcing artificial certainty. Recent examples include the 23-genus revision of Rubieae, the transfer of Sacosperma from Spermacoceae to Knoxieae, the recircumscription of Tarenna and recognition of Alatostigma, Nesotarenna, and Sonbridia, and the specialist 30-genus treatment of Chiococceae. Habroneuron, Placocarpa, and Xantonneopsis remain accepted genera but are not forced into a tribe where current evidence does not securely place them. (Delprete 2025; De Block et al. 2026; Kadereit & Schneeweiss 2026; Verstraete et al. 2026)

This synthesis necessarily differs from broad global databases in some places. Plants of the World Online, for example, currently lists more accepted genera than Tree TSAR. The difference is not simply a question of one source being newer: Tree TSAR adopts some recent specialist segregates while deliberately merging or withholding other names where a broader genus is better supported or a proposed split is not yet sufficiently implemented. The accepted-genera table therefore represents a documented systematic treatment rather than a direct export from any one database. (Royal Botanic Gardens, Kew 2026a)

Deep Backbone and Genomic Conflict

The deepest branches of Rubiaceae remain unusually informative. Acranthera and Coptosapelta form a well-supported sister pair, but their attachment to the rest of the family remains outside the two major subfamilies. Luculia is likewise an ancient lineage whose exact position has shifted among analyses and genomic datasets. The recurrent result is not evidence that these genera are taxonomically meaningless; rather, it shows that the earliest divergences of the family occurred in a pattern that has been difficult to reconstruct with confidence. Tree TSAR therefore retains all three genera and their tribes while leaving their subfamily assignment unresolved. (Razafimandimbison & Rydin 2024a)

Genomic conflict also occurs within the major subfamilies. In Rubioideae, plastome and nuclear datasets recover several strongly supported but incompatible relationships. Coalescent analyses indicate that incomplete lineage sorting can explain much of this discordance, while introgression or plastome capture may better explain some cases. The important distinction is between uncertainty in deep branching order and instability of the genera themselves: many generic limits remain well supported even when neighboring tribal relationships differ between genomic compartments. (Thureborn et al. 2024; Thilén et al. 2025)

Horticultural and Agricultural Uses

Coffee is the most economically prominent product of Rubiaceae. Cultivation is concentrated in Coffea arabica and C. canephora, but the genus contains a much broader wild radiation centered in tropical Africa and the western Indian Ocean. Wild species preserve genetic variation relevant to disease resistance, climate tolerance, plant architecture, flavor chemistry, and breeding, making the conservation of wild Coffea directly relevant to the long-term resilience of coffee agriculture. (Davis et al. 2019; Royal Botanic Gardens, Kew 2026a)

The family has also had major medicinal and industrial roles. Bark from Cinchona supplied quinine, which transformed malaria treatment and became one of the most historically consequential plant-derived medicines. The roots of Rubia species supplied durable red dyes that gave the Madder Family its vernacular identity, while numerous other Rubiaceae have long histories in regional pharmacopoeias. These uses reflect the family’s chemically diverse secondary metabolism, particularly its alkaloids and iridoids, but historical medicinal importance does not imply that raw plant material is interchangeable with standardized modern medicines. (Royal Botanic Gardens, Kew 2026b, 2026c)

Ornamental horticulture draws from many unrelated branches of Rubiaceae. Gardenia jasminoides is grown for intensely fragrant white flowers; Ixora, Mussaenda, and Pentas are important flowering shrubs or bedding plants in warm climates; Hamelia, Luculia, and several Rondeletia relatives are cultivated regionally; and temperate gardens use a smaller set of hardy woody taxa such as Cephalanthus. A recent survey in Martinique likewise identified Ixora, Mussaenda, and Gardenia as the principal ornamental Rubiaceae encountered in private gardens. Their cultural requirements differ sharply because the family spans tropical rainforest shrubs, montane plants, wetland shrubs, and temperate herbs, so native ecology remains more useful for cultivation than family membership alone. (Claude et al. 2024; Royal Botanic Gardens, Kew 2026a)

Conservation Issues

Conservation risk in Rubiaceae is uneven but substantial because so much of the family’s diversity is concentrated in tropical forests, islands, and narrow geographic ranges. Habitat loss, forest degradation, agricultural expansion, invasive species, and climate change can therefore affect highly localized lineages disproportionately. The family’s size also means that formal extinction-risk assessment remains incomplete, making phylogenetic and taxonomic work itself an important part of conservation planning: an unrecognized or poorly delimited lineage cannot be protected effectively if its range and identity remain obscure.

Wild coffee provides one of the clearest quantified examples. A global assessment of 124 wild Coffea species found at least 60% threatened with extinction, 45% absent from germplasm collections, and 28% not known from a protected area. Wild Coffea arabica is especially sensitive to climate change because its remaining native populations occupy montane forests in Ethiopia and South Sudan; climate-informed assessment moved the species into a substantially higher risk category than assessments that ignored projected climatic change. These findings make in situ forest protection, field collection, living germplasm, and complementary ex situ conservation important not only for biodiversity but also for crop improvement. (Davis et al. 2019; Moat et al. 2019)

Island and geographically restricted radiations present a second recurring conservation theme. Chiococceae, for example, has an amphi-Pacific distribution but an exceptional concentration of diversity in the Greater Antilles, where many species occupy small ranges. Similar patterns occur in Madagascar, the western Indian Ocean islands, the Guiana Shield, and other tropical centers of endemism. Such lineages can combine high phylogenetic distinctiveness with very limited distributions, so habitat protection and continued taxonomic survey remain inseparable conservation priorities. (Delprete 2025; Razafimandimbison & Rydin 2024a)

Major Clades

Tree TSAR recognizes the 72 formal tribes of the corrected 2024 framework while updating their accepted genera through 2026. The family is organized around two large subfamilies plus three ancient tribes that remain outside both. The alliances summarized below are informal phylogenetic groupings used to make this exceptionally large family intelligible; they do not replace the formal tribal ranks represented in the accepted-genera table. (Razafimandimbison & Rydin 2024a, 2024b)

Acranthereae, Coptosapelteae, and Luculieae form the deep backbone outside the two recognized subfamilies. Each tribe contains a single accepted genus in the current Tree TSAR roster: Acranthera, Coptosapelta, and Luculia. Acranthera and Coptosapelta are sisters, but the placement of their pair and of Luculia relative to Rubioideae and Dialypetalanthoideae remains unresolved. Their retention outside the two subfamilies is therefore a deliberate representation of phylogenetic uncertainty rather than a transitional placeholder.

Rubioideae contains 231 accepted Tree TSAR genera. Its diversity is organized broadly through the Urophylleae, Perameae, Psychotrieae, and Spermacoceae alliances, with Coussareeae retained outside those alliances because of deeper-placement uncertainty. The subfamily contains large tropical radiations such as Palicoureeae and Psychotrieae, species-rich herbaceous groups such as Spermacoceae, and Rubieae, the family’s principal temperate and cosmopolitan radiation. Recent nuclear and plastome studies have improved resolution substantially while also revealing biologically meaningful cytonuclear discordance. (Thureborn et al. 2024; Thilén et al. 2025; Kadereit & Schneeweiss 2026)

Dialypetalanthoideae contains 370 accepted Tree TSAR genera and includes much of the woody tropical diversity formerly divided among Cinchonoideae, Ixoroideae, and other subfamily concepts. Its principal informal groups are the Cinchoneae, Dialypetalantheae, Mussaendeae, Vanguerieae, and Coffeeae alliances, while Airospermeae, Jackieae, Retiniphylleae, and Steenisieae remain outside those alliances. The subfamily includes economically and horticulturally prominent genera such as Cinchona, Coffea, Gardenia, Ixora, Mussaenda, and Nauclea, together with many less familiar forest lineages. Recent revisions of Chiococceae, Pavetteae, and other tribes show that this large subfamily remains taxonomically active even though its broad phylogenetic structure is now comparatively stable. (Delprete 2025; De Block et al. 2026; Razafimandimbison & Rydin 2024a)

Accepted Genera
Achilleanthus J.G.Chavez (2021)
Acranthera Arn. ex Meisn. (1840)
Acrobotrys K.Schum. & K.Krause (1908)
Acrosynanthus Urb. (1913)
Acunaeanthus Borhidi, Komlódi & Moncada (1981)
Adenorandia Vermoesen (1922)
Adina Salisb. (1808)
Adolphoduckea Paudyal & Delprete (2018)
Afrocanthium (Bridson) Lantz & B.Bremer (2004)
Agathisanthemum Klotzsch (1861)
Agouticarpa C.H.Perss. (2003)
Aidia Lour. (1790)
Aidiopsis Tirveng. (1987)
Airosperma K.Schum. & Lauterb. (1900)
Aitchisonia Hemsl. ex Aitch. (1882)
Alatostigma De Block (2025)
Alberta E.Mey. (1838)
Aleisanthia Ridl. (1920)
Aleisanthiopsis Tange (1997)
Alibertia A.Rich. (1830)
Alleizettella Pit. (1923)
Alseis Schott (1827)
Altaiogalium Kadereit & Schneew. (2026)
Amaioua Aubl. (1775)
Amaracarpus Blume (1826)
Amphiasma Bremek. (1952)
Amphidasya Standl. (1936)
Amphistemon Groeninckx (2010)
Antherostele Bremek. (1940)
Anthorrhiza C.R.Huxley & Jebb (1990)
Anthospermopsis (K.Schum.) J.H.Kirkbr. (1997)
Anthospermum L. (1753)
Antirhea Comm. ex A.Juss. (1789)
Aoranthe Somers (1988)
Appunia Hook.f. (1873)
Arachnothryx Planch. (1849)
Arcytophyllum Schult. & Schult.f. (1827)
Argocoffeopsis Lebrun (1941)
Argostemma Wall. (1824)
Asperula L. (1753)
Astiella Jovet (1941)
Atractocarpus Schltr. & K.Krause (1908)
Atractogyne Pierre (1896)
Augusta Pohl (1828)
Aulacocalyx Hook.f. (1873)
Badusa A.Gray (1859)
Balmea Martínez (1942)
Bathysa C.Presl (1845)
Batopedina Verdc. (1953)
Belonophora Hook.f. (1873)
Benkara Adans. (1763)
Bertiera Aubl. (1775)
Bikkia Reinw. ex Blume (1825)
Blepharidium Standl. (1918)
Bobea Gaudich. (1827)
Boholia Merr. (1926)
Borreria G.Mey. (1818)
Bothriospora Hook.f. (1870)
Botryarrhena Ducke (1932)
Bouvardia Salisb. (1808)
Brachytome Hook.f. (1871)
Bradea Standl. (1932)
Bremeria Razafim. & Alejandro (2005)
Brenania Keay (1958)
Breonadia Ridsdale (1975)
Breonia A.Rich. ex DC. (1830)
Bridsonia Verstraete & A.E.van Wyk (2017)
Bullockia (Bridson) Razafim., Lantz & B.Bremer (2009)
Bungarimba K.M.Wong (2004)
Burchellia R.Br. (1820)
Byrsophyllum Hook.f. (1873)
Callipeltis Steven (1829)
Calochone Keay (1958)
Calycophyllum DC. (1830)
Calycosia A.Gray (1858)
Calycosiphonia Pierre ex Robbr. (1981)
Canephora Juss. (1789)
Canthium Lam. (1785)
Canthiumera K.M.Wong & Mahyuni (2018)
Capirona Spruce (1859)
Carajasia R.M.Salas, E.L.Cabral & Dessein (2015)
Carapichea Aubl. (1775)
Carpacoce Sond. (1865)
Carphalea Juss. (1789)
Carterella Terrell (1987)
Casasia A.Rich. (1850)
Catesbaea L. (1753)
Catunaregam Wolf (1776)
Cephalanthus L. (1753)
Ceratopyxis Hook.f. (1872)
Ceriscoides (Benth. & Hook.f.) Tirveng. (1978)
Chaetostachydium Airy Shaw (1965)
Chalepophyllum Hook.f. (1873)
Chamaepentas Bremek. (1952)
Chapelieria A.Rich. (1830)
Chassalia Comm. ex Poir. (1812)
Chewlunia Junhao Chen, P.K.Hoo & K.M.Wong (2023)
Chimarrhis Jacq. (1763)
Chiococca P.Browne (1756)
Chione DC. (1830)
Chomelia Jacq. (1760)
Ciliosemina Antonelli (2005)
Cinchona L. (1753)
Cinchonopsis L.Andersson (1995)
Cladoceras Bremek. (1940)
Clarkella Hook.f. (1880)
Clavistigma T.Y.Tu & P.W.Xie (2024)
Coccochondra Rauschert (1982)
Coccocypselum P.Browne (1756)
Coddia Verdc. (1981)
Coelopyrena Valeton (1909)
Coelospermum Blume (1826)
Coffea L. (1753)
Colleteria David W.Taylor (2003)
Colletoecema E.M.A.Petit (1963)
Condaminea DC. (1830)
Conostomium (Stapf) Cufod. (1948)
Coprosma J.R.Forst. & G.Forst. (1776)
Coptophyllum Korth. (1851)
Coptosapelta Korth. (1851)
Coptosperma Hook.f. (1873)
Cordiera A.Rich. (1830)
Cordylostigma Groeninckx & Dessein (2010)
Corynanthe Welw. (1869)
Cosmibuena Ruiz & Pav. (1794)
Cosmocalyx Standl. (1930)
Coussarea Aubl. (1775)
Coutaportla Urb. (1923)
Coutarea Aubl. (1775)
Coutareopsis Paudyal & Delprete (2018)
Cowiea Wernham (1914)
Craterispermum Benth. (1849)
Cremaspora Benth. (1849)
Crossopteryx Fenzl (1839)
Cruciana (Griseb.) Kadereit & Schneew. (2026)
Crucianella L. (1753)
Cruciata Mill. (1754)
Cruckshanksia Hook. & Arn. (1833)
Crusea Schltdl. & Cham. (1830)
Cubanola Aiello (1979)
Cuviera DC. (1807)
Cyanoneuron Tange (1998)
Cyclophyllum Hook.f. (1873)
Cynanchica P.Caputo & Del Guacchio (2020)
Damnacanthus C.F.Gaertn. (1805)
Danais Comm. ex Vent. (1799)
Debia Neupane & N.Wikstr. (2015)
Deccania Tirveng. (1983)
Declieuxia Kunth (1819)
Dendrosipanea Ducke (1935)
Denscantia E.L.Cabral & Bacigalupo (2001)
Dentella J.R.Forst. & G.Forst. (1776)
Deppea Schltdl. & Cham. (1830)
Deppeopsis Borhidi & Strancz. (2012)
Diacrodon Sprague (1928)
Diadorimia J.A.M.Carmo, Florentín & R.M.Salas (2021)
Dialypetalanthus Kuhlm. (1925)
Dibrachionostylus Bremek. (1952)
Dibridsonia K.M.Wong (2018)
Dichilanthe Thwaites (1856)
Didymaea Hook.f. (1873)
Didymosalpinx Keay (1958)
Dimetia (Wight & Arn.) Meisn. (1839)
Diodia L. (1753)
Dioecrescis Tirveng. (1983)
Dioicodendron Steyerm. (1963)
Diplospora DC. (1830)
Dirichletia Klotzsch (1853)
Discospermum Dalzell (1850)
Ditrichanthus Borhidi, E.Martínez & Ramos (2015)
Diyaminauclea Ridsdale (1978)
Dolianthus C.H.Wright (1899)
Dolichocarpa K.L.Gibbons (2020)
Dolichodelphys K.Schum. & K.Krause (1909)
Dolicholobium A.Gray (1859)
Dolichometra K.Schum. (1904)
Dolichopentas Kårehed & B.Bremer (2007)
Donnellyanthus Borhidi (2011)
Dunnia Tutcher (1905)
Duperrea Pierre ex Pit. (1924)
Duroia L.f. (1782)
Durringtonia R.J.F.Hend. & Guymer (1985)
Edrastima Raf. (1834)
Eizia Standl. (1940)
Elaeagia Wedd. (1849)
Emmenopterys Oliv. (1889)
Emmeorhiza Pohl ex Endl. (1838)
Empogona Hook.f. (1871)
Eosanthe Urb. (1923)
Eriosemopsis Robyns (1928)
Erithalis P.Browne (1756)
Ernodea Sw. (1788)
Etericius Desv. (1825)
Euclinia Salisb. (1807)
Eumachia DC. (1830)
Exallage Bremek. (1952)
Exallosperma De Block (2018)
Exostema (Pers.) Bonpl. (1807)
Fadogia Schweinf. (1868)
Fadogiella Robyns (1928)
Faramea Aubl. (1775)
Ferdinandusa Pohl (1829)
Feretia Delile (1843)
Fergusonia Hook.f. (1872)
Fernelia Comm. ex Lam. (1788)
Flagenium Baill. (1880)
Foonchewia R.J.Wang (2012)
Fosbergia Tirveng. & Sastre (1997)
Gaertnera Lam. (1792)
Galianthe Griseb. (1879)
Galiniera Delile (1843)
Galium L. (1753)
Gallienia Dubard & Dop (1925)
Galopina Thunb. (1781)
Ganguelia Robbr. (1996)
Gardenia J.Ellis (1761)
Gardeniopsis Miq. (1869)
Genipa L. (1754)
Geophila D.Don (1825)
Gillespiea A.C.Sm. (1936)
Gleasonia Standl. (1931)
Glionnetia Tirveng. (1984)
Globulostylis Wernham (1913)
Glossostipula Lorence (1986)
Gomphocalyx Baker (1887)
Gonzalagunia Ruiz & Pav. (1794)
Greenea Wight & Arn. (1834)
Greeniopsis Merr. (1909)
Guettarda L. (1753)
Guettardella Champ. ex Benth. (1852)
Gynochthodes Blume (1826)
Gyrostipula J.-F.Leroy (1975)
Habroneuron Standl. (1927)
Hamelia Jacq. (1760)
Hamogalium Kadereit & Schneew. (2026)
Hedstromia A.C.Sm. (1936)
Hedyotis L. (1753)
Hedythyrsus Bremek. (1952)
Heinsenia K.Schum. (1897)
Heinsia DC. (1830)
Hekistocarpa Hook.f. (1873)
Helictosperma De Block (2018)
Henriquezia Spruce ex Benth. (1854)
Heterophyllaea Hook.f. (1873)
Hexaphylla (Klokov) P.Caputo & Del Guacchio (2020)
Hexasepalum Bartl. ex DC. (1830)
Hillia Jacq. (1760)
Himalrandia T.Yamaz. (1970)
Hindsia Benth. ex Lindl. (1844)
Hintonia Bullock (1935)
Hippotis Ruiz & Pav. (1794)
Hodgkinsonia F.Muell. (1861)
Hoffmannia Sw. (1788)
Holstianthus Steyerm. (1986)
Holtonia Standl. (1932)
Homollea Arènes (1960)
Houstonia Gronov. (1753)
Hutchinsonia Robyns (1928)
Hydnophytum Jack (1823)
Hydrogalium Kadereit & Schneew. (2026)
Hydrophylax L.f. (1782)
Hymenocoleus Robbr. (1975)
Hymenodictyon Wall. (1824)
Hyperacanthus E.Mey. ex Bridson (1985)
Hypobathrum Blume (1826)
Hyptianthera Wight & Arn. (1834)
Involucrella (Benth. & Hook.f.) Neupane & N.Wikstr. (2015)
Isertia Schreb. (1789)
Isidorea A.Rich. ex DC. (1830)
Ixora L. (1753)
Jackiopsis Ridsdale (1979)
Jamaicanthus Borhidi (2018)
Janotia J.-F.Leroy (1975)
Januaria R.M.Salas & Nuñez Florentin (2023)
Joosia H.Karst. (1859)
Jovetia Guédès (1975)
Jubogalium (Ehrend.) Kadereit & Schneew. (2026)
Kadua Cham. & Schltdl. (1829)
Kailarsenia Tirveng. (1983)
Kajewskiella Merr. & L.M.Perry (1947)
Kanapia Arriola & Alejandro (2016)
Keetia E.Phillips (1926)
Kelloggia Torr. ex Benth. & Hook.f. (1873)
Kerianthera J.H.Kirkbr. (1985)
Khasiaclunea Ridsdale (1978)
Kindia Cheek (2018)
Knoxia L. (1753)
Kochummenia K.M.Wong (1984)
Kohautia Cham. & Schltdl. (1829)
Kraussia Harv. (1842)
Kupeantha Cheek (2018)
Kutchubaea Fisch. ex DC. (1830)
Ladenbergia Klotzsch (1846)
Lamprothamnus Hiern (1877)
Landiopsis Capuron ex Bosser (1998)
Larsenaikia Tirveng. (1993)
Lasianthus Jack (1823)
Lathraeocarpa Bremek. (1957)
Lecariocalyx Bremek. (1940)
Lelya Bremek. (1952)
Lemyrea (A.Chev.) A.Chev. & Beille (1939)
Leonoria Nuñez Florentin & R.M.Salas (2024)
Leptactina Hook.f. (1871)
Leptodermis Wall. (1824)
Leptomischus Drake (1895)
Leptopetalum Hook. & Arn. (1838)
Leptoscela Hook.f. (1873)
Leptostigma Arn. (1841)
Lerchea L. (1771)
Limnosipanea Hook.f. (1868)
Lintersemina Humberto Mend., Celis & M.A.González (2020)
Lorencea Borhidi (2003)
Luculia Sweet (1826)
Lucya DC. (1830)
Ludekia Ridsdale (1978)
Macbrideina Standl. (1929)
Machaonia Bonpl. (1806)
Macrocnemum P.Browne (1756)
Macrosphyra Hook.f. (1873)
Maguireocharis Steyerm. (1972)
Maguireothamnus Steyerm. (1964)
Malanea Aubl. (1775)
Manettia Mutis ex L. (1771)
Manostachya Bremek. (1952)
Mantalania Capuron ex J.-F.Leroy (1973)
Martensianthus Borhidi & Lozada-Pérez (2011)
Maschalodesme K.Schum. & Lauterb. (1900)
Massularia (K.Schum.) Hoyle (1937)
Mastixiodendron Melch. (1925)
Mazaea Krug & Urb. (1897)
Melanopsidium Colla (1824)
Melanoxerus Kainul. & B.Bremer (2014)
Mericarpaea Boiss. (1843)
Merumea Steyerm. (1972)
Metabolos Blume (1826)
Mexotis Terrell & H.Rob. (2009)
Meyna Roxb. ex Link (1820)
Micrasepalum Urb. (1913)
Microphysa Schrenk (1844)
Mitchella L. (1753)
Mitracarpus Zucc. (1827)
Mitragyna Korth. (1839)
Mitrasacmopsis Jovet (1935)
Mitriostigma Hochst. (1842)
Molopanthera Turcz. (1848)
Monosalpinx N.Hallé (1968)
Morelia A.Rich. (1830)
Morinda L. (1753)
Morindopsis Hook.f. (1873)
Motleyothamnus Paudyal & Delprete (2018)
Mouretia Pit. (1922)
Multidentia Gilli (1973)
Mussaenda L. (1753)
Mussaendopsis Baill. (1879)
Mycetia Reinw. (1825)
Myrmecodia Jack (1823)
Myrmeconauclea Merr. (1921)
Myrmephytum Becc. (1884)
Nargedia Bedd. (1874)
Nauclea L. (1762)
Neanotis W.H.Lewis (1966)
Neblinathamnus Steyerm. (1964)
Nematostylis Hook.f. (1873)
Nenax Gaertn. (1788)
Neobertiera Wernham (1917)
Neoblakea Standl. (1930)
Neohymenopogon Bennet (1981)
Neolamarckia Bosser (1984)
Neolaugeria Nicolson (1979)
Neomussaenda Tange (1994)
Neonauclea Merr. (1915)
Nernstia Urb. (1923)
Nertera Banks ex Gaertn. (1788)
Nesohedyotis (Hook.f.) Bremek. (1952)
Nesotarenna De Block (2025)
Neurocalyx Hook. (1837)
Nichallea Bridson (1978)
Nodocarpaea A.Gray (1883)
Normandia Hook.f. (1872)
Nostolachma T.Durand (1888)
Notopleura (Hook.f.) Bremek. (1934)
Ochreinauclea Ridsdale & Bakh.f. (1978)
Octotropis Bedd. (1873)
Oldenlandia L. (1753)
Oldenlandiopsis Terrell & W.H.Lewis (1990)
Oligocodon Keay (1958)
Omiltemia Standl. (1918)
Opercularia Gaertn. (1788)
Ophiorrhiza L. (1753)
Oreopolus Schltdl. (1857)
Osa Aiello (1979)
Otiophora Zucc. (1832)
Otomeria Benth. (1849)
Ottoschmidtia Urb. (1924)
Oxyanthus DC. (1807)
Oxyceros Lour. (1790)
Pachystylus K.Schum. (1889)
Paederia L. (1767)
Pagamea Aubl. (1775)
Paganuccia R.M.Salas (2021)
Palicourea Aubl. (1775)
Paracarphalea Razafim., Ferm, B.Bremer & Kårehed (2016)
Paracephaelis Baill. (1879)
Parachimarrhis Ducke (1922)
Paracorynanthe Capuron ex J.-F.Leroy (1978)
Paragenipa Baill. (1879)
Parainvolucrella R.J.Wang (2021)
Paraknoxia Bremek. (1952)
Paralasianthus H.Zhu (2015)
Paranotis Pedley ex K.L.Gibbons (2020)
Parapentas Bremek. (1952)
Patima Aubl. (1775)
Pauridiantha Hook.f. (1873)
Pavetta L. (1753)
Payera Baill. (1878)
Pelagodendron Seem. (1866)
Pentagonia Benth. (1845)
Pentaloncha Hook.f. (1873)
Pentanisia Harv. (1842)
Pentanopsis Rendle (1898)
Pentas Benth. (1844)
Pentodon Hochst. (1844)
Peponidium (Baill.) Arènes (1960)
Perakanthus Robyns ex Ridl. (1925)
Perama Aubl. (1775)
Peripeplus Pierre (1898)
Petitiocodon Robbr. (1988)
Phellocalyx Bridson (1980)
Phialanthus Griseb. (1861)
Phialiphora Groeninckx (2010)
Phuopsis (Griseb.) Hook.f. (1873)
Phyllis L. (1753)
Phyllocrater Wernham (1914)
Phyllomelia Griseb. (1866)
Phyllopentas (Verdc.) Kårehed & B.Bremer (2007)
Phylohydrax Puff (1986)
Picardaea Urb. (1903)
Pimentelia Wedd. (1849)
Pinarophyllon Brandegee (1914)
Pinckneya Michx. (1803)
Pitardella Tirveng. (2003)
Pittoniotis Griseb. (1858)
Placocarpa Hook.f. (1873)
Planaltina R.M.Salas & E.L.Cabral (2010)
Platycarpum Bonpl. (1811)
Pleiocoryne Rauschert (1982)
Plocama Aiton (1789)
Plocaniophyllon Brandegee (1914)
Pogonopus Klotzsch (1853)
Polysphaeria Hook.f. (1873)
Polyura Hook.f. (1868)
Pomax Sol. ex DC. (1830)
Porterandia Ridl. (1940)
Portlandia P.Browne (1756)
Posoqueria Aubl. (1775)
Pouchetia A.Rich. (1830)
Preussiodora Keay (1958)
Prismatomeris Thwaites (1856)
Pseudaidia Tirveng. (1986)
Pseudocoptosperma De Block (2018)
Pseudogalium L.E.Yang, Z.L.Nie & H.Sun (2018)
Pseudomantalania J.-F.Leroy (1973)
Pseudomiltemia Borhidi (2004)
Pseudomussaenda Wernham (1916)
Pseudonesohedyotis Tennant (1965)
Pseudopyxis Miq. (1867)
Psychotria L. (1759)
Psydrax Gaertn. (1788)
Psyllocarpus Mart. & Zucc. (1824)
Pteridocalyx Wernham (1911)
Pubistylus Thoth. (1966)
Puffia Razafim. & B.Bremer (2014)
Pygmaeothamnus Robyns (1928)
Pyrostria Comm. ex Juss. (1789)
Rachicallis DC. (1830)
Ramonadoxa Paudyal & Delprete (2018)
Ramosmania Tirveng. & Verdc. (1982)
Randia Houst. ex L. (1753)
Raritebe Wernham (1917)
Razafimandimbisonia Kainul. & B.Bremer (2009)
Remijia DC. (1829)
Renistipula Borhidi (2004)
Rennellia Korth. (1851)
Retiniphyllum Bonpl. (1806)
Rhadinopus S.Moore (1930)
Rhodopentas Kårehed & B.Bremer (2007)
Richardia L. (1753)
Ridsdalea J.T.Pereira & K.M.Wong (2016)
Riodocea Delprete (1999)
Robbrechtia De Block (2003)
Robynsia Hutch. (1931)
Rogiera Planch. (1849)
Roigella Borhidi & M.Fernández (1982)
Ronabea Aubl. (1775)
Rondeletia L. (1753)
Rosenbergiodendron Fagerl. (1948)
Rothmannia Thunb. (1776)
Rovaeanthus Borhidi (2004)
Rubia L. (1753)
Rubovietnamia Tirveng. (1998)
Rudgea Salisb. (1807)
Rustia Klotzsch (1846)
Rutidea DC. (1807)
Rytigynia Blume (1850)
Sabicea Aubl. (1775)
Sacosperma G.Taylor (1944)
Saldinia A.Rich. ex DC. (1830)
Salzmannia DC. (1830)
Saprosma Blume (1826)
Schismatoclada Baker (1883)
Schizenterospermum Homolle ex Arènes (1960)
Schizocalyx Wedd. (1854)
Schizocolea Bremek. (1951)
Schizomussaenda H.L.Li (1943)
Schmidtottia Urb. (1923)
Schradera Vahl (1797)
Schumanniophyton Harms (1897)
Schwendenera K.Schum. (1887)
Scleromitrion (Wight & Arn.) Meisn. (1838)
Scolosanthus Vahl (1797)
Scyphiphora C.F.Gaertn. (1806)
Semaphyllanthe L.Andersson (1995)
Sericanthe Robbr. (1978)
Serissa Comm. ex A.Juss. (1789)
Seychellea Razafim., Kainul. & Rydin (2019)
Shaferocharis Urb. (1912)
Sherardia L. (1753)
Sherbournia G.Don (1855)
Siemensia Urb. (1923)
Simira Aubl. (1775)
Singaporandia K.M.Wong (2016)
Sipanea Aubl. (1775)
Sipaneopsis Steyerm. (1967)
Siphonandrium K.Schum. (1905)
Solenandra Hook.f. (1873)
Sommera Schltdl. (1835)
Sonbridia De Block (2025)
Spermacoce L. (1753)
Spermadictyon Roxb. (1815)
Sphinctanthus Benth. (1841)
Squamellaria Becc. (1886)
Stachyarrhena Hook.f. (1870)
Staelia Cham. & Schltdl. (1828)
Standleya Brade (1932)
Steenisia Bakh.f. (1952)
Stenaria (Raf.) Terrell (2001)
Stenosepala C.H.Perss. (2000)
Stenostomum C.F.Gaertn. (1806)
Stenotis Terrell (2001)
Stephanococcus Bremek. (1952)
Steyermarkia Standl. (1940)
Stilpnophyllum Hook.f. (1873)
Streblosa Korth. (1851)
Strumpfia Jacq. (1760)
Suberanthus Borhidi & M.Fernández (1982)
Sylvainia M.F.Romero & R.M.Salas (2023)
Synaptantha Hook.f. (1873)
Syringantha Standl. (1930)
Tainus Torr.-Montúfar, H.Ochot. & Borsch (2017)
Tamilnadia Tirveng. & Sastre (1979)
Tammsia H.Karst. (1861)
Tamridaea Thulin & B.Bremer (1998)
Tarenna Gaertn. (1788)
Tarennella De Block (2021)
Tarennoidea Tirveng. & Sastre (1979)
Temnocalyx Robyns (1928)
Temnopteryx Hook.f. (1873)
Tennantia Verdc. (1981)
Tessiera DC. (1830)
Thaigardenia Sungkaew, Teerawat., Chamch. & K.M.Wong (2024)
Thamnoldenlandia Groeninckx (2010)
Theligonum L. (1753)
Thiollierea Montrouz. (1860)
Thliphthisa (Griseb.) P.Caputo & Del Guacchio (2020)
Thogsennia Aiello (1979)
Timonius Rumph. ex DC. (1830)
Tinadendron Achille (2006)
Tobagoa Urb. (1916)
Tocoyena Aubl. (1775)
Tortuella Urb. (1927)
Tournefortiopsis Rusby (1907)
Trailliaedoxa W.W.Sm. & Forrest (1917)
Triainolepis Hook.f. (1873)
Tricalysia A.Rich. (1830)
Trichogalium (DC.) Fourr. (1868)
Trichostachys Hook.f. (1873)
Triflorensia S.T.Reynolds (2005)
Tromlyca Borhidi (2017)
Tulearia De Block (2018)
Uncaria Schreb. (1789)
Urophyllum Wall. (1824)
Valantia L. (1753)
Vangueria Juss. (1789)
Vangueriella Verdc. (1987)
Vangueriopsis Robyns (1928)
Vidalasia Tirveng. (1998)
Villaria Rolfe (1884)
Virectaria Bremek. (1952)
Warszewiczia Klotzsch (1853)
Wendlandia Bartl. ex DC. (1830)
Wittmackanthus Kuntze (1891)
Xanthophytum Reinw. ex Blume (1823)
Xantonneopsis Pit. (1923)
Zuccarinia Blume (1826)

Additional Information

iNaturalist: Observations, photographs, phenology, distribution mapping, and community identifications for the Madder Family. Higher classification may not yet reflect the current Tree TSAR two-subfamily framework.

Plants of the World Online: Royal Botanic Gardens, Kew taxonomic and nomenclatural treatment with descriptions, distributions, accepted names, and links to constituent genera. Generic circumscriptions differ from Tree TSAR in several recently revised complexes.

World Flora Online: Global taxonomic treatment of Rubiaceae with nomenclature and descriptive information.

Flora of China: Detailed regional treatment of Rubiaceae in China, including morphology, identification, distribution, and cultivated taxa; its higher classification predates the current Tree TSAR framework.

International Plant Names Index: Nomenclatural record for Rubiaceae Juss. and access to publication details for names within the family.

GBIF: Global occurrence records and taxonomic crosswalks for Rubiaceae; the GBIF backbone is a data-integration classification and should not be assumed to match Tree TSAR genus circumscriptions.

References and Further Reading

Claude J-P, Ranguin N, Abati Y, Joseph P (2024) Ornamentals of Rubiaceae Family: current status and potency evaluation of its phytocoenosis for dooryard gardening in Martinique. Ornamental Horticulture 30: 1-14. https://doi.org/10.1590/2447-536X.v30.e242778

Davis AP, Chadburn H, Moat J, O’Sullivan R, Hargreaves S, Nic Lughadha E (2019) High extinction risk for wild coffee species and implications for coffee sector sustainability. Science Advances 5(1): eaav3473. https://doi.org/10.1126/sciadv.aav3473

De Block P, Razafimandimbison SG, Rakotonasolo F, Janssens SB (2026) Dismantling the genus Tarenna (Rubiaceae: Pavetteae) in Africa and Madagascar, with the description of three new genera. Taxon 75(1): e70031. https://doi.org/10.1002/tax.70031

Delprete PG (2025) Synopsis and typification of New World members of the tribe Chiococceae (Rubiaceae, Dialypetalanthoideae). Journal of the Botanical Research Institute of Texas 19(4): 501-605. https://doi.org/10.17348/jbrit.v19.i4.1443

Kadereit JW, Schneeweiss GM (2026) A revised classification of Rubiaceae subfamily Rubioideae tribe Rubieae. Taxon 75(2): e70119. https://doi.org/10.1002/tax.70119

Moat J, Gole TW, Davis AP (2019) Least concern to endangered: Applying climate change projections profoundly influences the extinction risk assessment for wild Arabica coffee. Global Change Biology 25(2): 390-403. https://doi.org/10.1111/gcb.14341

Razafimandimbison SG, Rydin C (2024a) Phylogeny and classification of the coffee family (Rubiaceae, Gentianales): Overview and outlook. Taxon 73(3): 673-717. https://doi.org/10.1002/tax.13167

Razafimandimbison SG, Rydin C (2024b) Addendum and Corrigendum to: Phylogeny and classification of the coffee family (Rubiaceae, Gentianales): Overview and outlook. Taxon 73(6): 1556-1557. https://doi.org/10.1002/tax.13293

Royal Botanic Gardens, Kew (2026a) Rubiaceae Juss. Plants of the World Online. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30032120-2

Royal Botanic Gardens, Kew (2026b) Cinchona tree. Kew Science. https://www.kew.org/plants/cinchona-tree

Royal Botanic Gardens, Kew (2026c) Rubia L. Plants of the World Online. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:35277-1/general-information

Thilén L, Lachenaud O, Thureborn O, Razafimandimbison SG, Rydin C (2025) Phylogeny of Palicoureeae (Rubiaceae) based on 353 low-copy nuclear genes - with particular focus on Hymenocoleus Robbr. Molecular Phylogenetics and Evolution 208: 108338. https://doi.org/10.1016/j.ympev.2025.108338

Thureborn O, Wikström N, Razafimandimbison SG, Rydin C (2024) Plastid phylogenomics and cytonuclear discordance in Rubioideae, Rubiaceae. PLOS ONE 19(5): e0302365. https://doi.org/10.1371/journal.pone.0302365

Verstraete B, Lachenaud O, De Block P, Mertens A, Janssens SB, Schepers JR, Jansen S, Robbrecht E (2026) Molecular and morphological evidence supports transferring Sacosperma (Rubiaceae, Rubioideae) from Spermacoceae to Knoxieae. PhytoKeys 272: 79-106. https://doi.org/10.3897/phytokeys.272.179527