| Abbottia F. Muell. | Timonius DC. | | | Abbottia F. Muell. | Timonius DC. | Rubiaceae |
| Acrodryon Spreng. | Cephalanthus L. | | | Acrodryon Spreng. | Cephalanthus L. | Rubiaceae |
| Acrostoma Didr. | Remijia DC. | | | Acrostoma Didr. | Remijia DC. | Rubiaceae |
| Acrosynanthus Urb. | | a | | Acrosynanthus Urb. | | Rubiaceae |
| Acunaeanthus Borhidi et al. | | a | | Acunaeanthus Borhidi et al. | | Rubiaceae |
| Adina Salisb. | | a | | Adina Salisb. | | Rubiaceae |
| Adinauclea Ridsdale | | a | | Adinauclea Ridsdale | | Rubiaceae |
| Agylophora Neck. ex Raf., nom. inval. | Uncaria Schreb. | | | Agylophora Neck. ex Raf., nom. inval. | Uncaria Schreb. | Rubiaceae |
| Allenanthus Standl. | | a | | Allenanthus Standl. | | Rubiaceae |
| Anisomeris C. Presl | Chomelia Jacq. | | | Anisomeris C. Presl | Chomelia Jacq. | Rubiaceae |
| Antacanthus A. Rich. ex DC. | Scolosanthus Vahl | | | Antacanthus A. Rich. ex DC. | Scolosanthus Vahl | Rubiaceae |
| Anthocephalus A. Rich. | Breonia A. Rich. ex DC. | | | Anthocephalus A. Rich. | Breonia A. Rich. ex DC. | Rubiaceae |
| Antirhea Comm. ex Juss. | | a | | Antirhea Comm. ex Juss. | | Rubiaceae |
| Antirhoea Comm. ex Juss. | Antirhea Comm. ex Juss. | | | Antirhoea Comm. ex Juss. | Antirhea Comm. ex Juss. | Rubiaceae |
| Antirrhoea Endl. | Antirhea Comm. ex Juss. | | | Antirrhoea Endl. | Antirhea Comm. ex Juss. | Rubiaceae |
| Arachnimorpha Desv. | Rondeletia L. | | | Arachnimorpha Desv. | Rondeletia L. | Rubiaceae |
| Arachnothryx Planch. | | a | | Arachnothryx Planch. | | Rubiaceae |
| Ariadne Urb. | Phyllomelia Griseb. | | | Ariadne Urb. | Phyllomelia Griseb. | Rubiaceae |
| Asemnantha Hook. f. | | a | | Asemnantha Hook. f. | | Rubiaceae |
| Axolus Raf. | Cephalanthus L. | | | Axolus Raf. | Cephalanthus L. | Rubiaceae |
| Badusa A. Gray | | a | | Badusa A. Gray | | Rubiaceae |
| Bamboga Baill., orth. var. | Mitragyna Korth. | | | Bamboga Baill., orth. var. | Mitragyna Korth. | Rubiaceae |
| Bancalus Kuntze | Nauclea L. | | | Bancalus Kuntze | Nauclea L. | Rubiaceae |
| Bathysograya Kuntze | Badusa A. Gray | | | Bathysograya Kuntze | Badusa A. Gray | Rubiaceae |
| Bellizinca Borhidi | Deppea Cham. & Schltdl. | | | Bellizinca Borhidi | Deppea Cham. & Schltdl. | Rubiaceae |
| Benteca Adans. | Hymenodictyon Wall. | | | Benteca Adans. | Hymenodictyon Wall. | Rubiaceae |
| Bikkia Reinw. | | a | | Bikkia Reinw. | | Rubiaceae |
| Bikkiopsis Brongn. & Gris | Bikkia Reinw. | | | Bikkiopsis Brongn. & Gris | Bikkia Reinw. | Rubiaceae |
| Blepharidium Standl. | | a | | Blepharidium Standl. | | Rubiaceae |
| Bobea Gaudich. | | a | | Bobea Gaudich. | | Rubiaceae |
| Breonadia Ridsdale | | a | | Breonadia Ridsdale | | Rubiaceae |
| Breonia A. Rich. ex DC. | | a | | Breonia A. Rich. ex DC. | | Rubiaceae |
| Brignolia DC. | Isertia Schreb. | | | Brignolia DC. | Isertia Schreb. | Rubiaceae |
| Bruinsmania Miq. | Isertia Schreb. | | | Bruinsmania Miq. | Isertia Schreb. | Rubiaceae |
| Buena Pohl | Cosmibuena Ruiz & Pav. | | | Buena Pohl | Cosmibuena Ruiz & Pav. | Rubiaceae |
| Buena Cav. | Gonzalagunia Ruiz & Pav. | | | Buena Cav. | Gonzalagunia Ruiz & Pav. | Rubiaceae |
| Bunophila Willd. | Machaonia Humb. & Bonpl. | | | Bunophila Willd. | Machaonia Humb. & Bonpl. | Rubiaceae |
| Burneya Cham. & Schltdl. | Timonius DC. | | | Burneya Cham. & Schltdl. | Timonius DC. | Rubiaceae |
| Burttdavya Hoyle | | a | | Burttdavya Hoyle | | Rubiaceae |
| Cadamba Sonn. | Guettarda L. | | | Cadamba Sonn. | Guettarda L. | Rubiaceae |
| Campylobotrys Lem. | Hoffmannia Sw. | | | Campylobotrys Lem. | Hoffmannia Sw. | Rubiaceae |
| Caruelina Kuntze | Chomelia Jacq. | | | Caruelina Kuntze | Chomelia Jacq. | Rubiaceae |
| Caryococca Willd. ex Roem. & Schult., nom. inval. | Gonzalagunia Ruiz & Pav. | | | Caryococca Willd. ex Roem. & Schult., nom. inval. | Gonzalagunia Ruiz & Pav. | Rubiaceae |
| Cascarilla (Endl.) Wedd. | Ladenbergia Klotzsch | | | Cascarilla (Endl.) Wedd. | Ladenbergia Klotzsch | Rubiaceae |
| Cassupa Humb. & Bonpl. | Isertia Schreb. | | | Cassupa Humb. & Bonpl. | Isertia Schreb. | Rubiaceae |
| Catesbaea Gronov. | | a | | Catesbaea Gronov. | | Rubiaceae |
| Catesbya Cothen., orth. var. | Catesbaea Gronov. | | | Catesbya Cothen., orth. var. | Catesbaea Gronov. | Rubiaceae |
| Cephalanthus L. | | a | | Cephalanthus L. | | Rubiaceae |
| Cephalidium A. Rich. ex DC. | Breonia A. Rich. ex DC. | | | Cephalidium A. Rich. ex DC. | Breonia A. Rich. ex DC. | Rubiaceae |
| Cephalina Thonn. | Sarcocephalus Afzel. ex Sabine | | | Cephalina Thonn. | Sarcocephalus Afzel. ex Sabine | Rubiaceae |
| Cephalodendron Steyerm. | | a | | Cephalodendron Steyerm. | | Rubiaceae |
| Ceratopyxis Hook. f. | | a | | Ceratopyxis Hook. f. | | Rubiaceae |
| Chiococca P. Browne | | a | | Chiococca P. Browne | | Rubiaceae |
| Chione DC. | | a | | Chione DC. | | Rubiaceae |
| Chomelia Jacq. | | a | | Chomelia Jacq. | | Rubiaceae |
| Choristes Benth. | Deppea Cham. & Schltdl. | | | Choristes Benth. | Deppea Cham. & Schltdl. | Rubiaceae |
| Ciliosemina Antonelli | | a | | Ciliosemina Antonelli | | Rubiaceae |
| Cinchona L. | | a | | Cinchona L. | | Rubiaceae |
| Cinchonopsis L. Andersson | | a | | Cinchonopsis L. Andersson | | Rubiaceae |
| Colleteria David W. Taylor | Wandersong David W. Taylor | | | Colleteria David W. Taylor | Wandersong David W. Taylor | Rubiaceae |
| Corynanthe Welw. | | a | | Corynanthe Welw. | | Rubiaceae |
| Cosmibuena Ruiz & Pav. | | a | | Cosmibuena Ruiz & Pav. | | Rubiaceae |
| Coutaportla Urb. | | a | | Coutaportla Urb. | | Rubiaceae |
| Coutarea Aubl. | | a | | Coutarea Aubl. | | Rubiaceae |
| Creatantha Standl. | Isertia Schreb. | | | Creatantha Standl. | Isertia Schreb. | Rubiaceae |
| Crusea A. Rich. | Chione DC. | | | Crusea A. Rich. | Chione DC. | Rubiaceae |
| Csapodya Borhidi | Deppea Cham. & Schltdl. | | | Csapodya Borhidi | Deppea Cham. & Schltdl. | Rubiaceae |
| Cuatrecasasia Standl. | Arachnothryx Planch. | | | Cuatrecasasia Standl. | Arachnothryx Planch. | Rubiaceae |
| Cuatrecasasiodendron Standl. & Steyerm. | Arachnothryx Planch. | | | Cuatrecasasiodendron Standl. & Steyerm. | Arachnothryx Planch. | Rubiaceae |
| Cubanola Aiello | | a | | Cubanola Aiello | | Rubiaceae |
| Cunninghamia Schreb. | Malanea Aubl. | | | Cunninghamia Schreb. | Malanea Aubl. | Rubiaceae |
| Deppea Cham. & Schltdl. | | a | | Deppea Cham. & Schltdl. | | Rubiaceae |
| Dicrobotryum Willd. | Guettarda L. | | | Dicrobotryum Willd. | Guettarda L. | Rubiaceae |
| Dolichanthera Schltr. & K. Krause | Morierina Vieill. | | | Dolichanthera Schltr. & K. Krause | Morierina Vieill. | Rubiaceae |
| Donkelaaria Lem. | Guettarda L. | | | Donkelaaria Lem. | Guettarda L. | Rubiaceae |
| Donnellyanthus Borhidi | | a | | Donnellyanthus Borhidi | | Rubiaceae |
| Duggena Vahl, nom. inval. | Gonzalagunia Ruiz & Pav. | | | Duggena Vahl, nom. inval. | Gonzalagunia Ruiz & Pav. | Rubiaceae |
| Duhamelia Pers. | Hamelia Jacq. | | | Duhamelia Pers. | Hamelia Jacq. | Rubiaceae |
| Echinodendrum A. Rich. | Scolosanthus Vahl | | | Echinodendrum A. Rich. | Scolosanthus Vahl | Rubiaceae |
| Edechia Loefl. | Guettarda L. | | | Edechia Loefl. | Guettarda L. | Rubiaceae |
| Edithea Standl. | Omiltemia Standl. | | | Edithea Standl. | Omiltemia Standl. | Rubiaceae |
| Elattospermum Soler. | Breonia A. Rich. ex DC. | | | Elattospermum Soler. | Breonia A. Rich. ex DC. | Rubiaceae |
| Eresimus Raf. | Cephalanthus L. | | | Eresimus Raf. | Cephalanthus L. | Rubiaceae |
| Erithalis G. Forst. | Timonius DC. | | | Erithalis G. Forst. | Timonius DC. | Rubiaceae |
| Erithalis P. Browne | | a | | Erithalis P. Browne | | Rubiaceae |
| Erosmia A. Juss. | Hoffmannia Sw. | | | Erosmia A. Juss. | Hoffmannia Sw. | Rubiaceae |
| Euosmia Kunth | Hoffmannia Sw. | | | Euosmia Kunth | Hoffmannia Sw. | Rubiaceae |
| Eupyrena Wight & Arn. | Timonius DC. | | | Eupyrena Wight & Arn. | Timonius DC. | Rubiaceae |
| Evosmia Humb. & Bonpl. | Hoffmannia Sw. | | | Evosmia Humb. & Bonpl. | Hoffmannia Sw. | Rubiaceae |
| Exostema (Pers.) Humb. & Bonpl. | | a | | Exostema (Pers.) Humb. & Bonpl. | | Rubiaceae |
| Exostemma DC., orth. var. | Exostema (Pers.) Humb. & Bonpl. | | | Exostemma DC., orth. var. | Exostema (Pers.) Humb. & Bonpl. | Rubiaceae |
| Exostemon Post & Kuntze, orth. var. | Exostema (Pers.) Humb. & Bonpl. | | | Exostemon Post & Kuntze, orth. var. | Exostema (Pers.) Humb. & Bonpl. | Rubiaceae |
| Fereiria Vell. ex Vand. | Hillia Jacq. | | | Fereiria Vell. ex Vand. | Hillia Jacq. | Rubiaceae |
| Franchetia Baill. | Breonia A. Rich. ex DC. | | | Franchetia Baill. | Breonia A. Rich. ex DC. | Rubiaceae |
| Gonianthes A. Rich. | Cubanola Aiello | | | Gonianthes A. Rich. | Cubanola Aiello | Rubiaceae |
| Gonzalagunia Ruiz & Pav. | | a | | Gonzalagunia Ruiz & Pav. | | Rubiaceae |
| Gonzalea Pers. | Gonzalagunia Ruiz & Pav. | | | Gonzalea Pers. | Gonzalagunia Ruiz & Pav. | Rubiaceae |
| Grisia Brongn. | Bikkia Reinw. | | | Grisia Brongn. | Bikkia Reinw. | Rubiaceae |
| Guettarda L. | | a | | Guettarda L. | | Rubiaceae |
| Guettardella Champ. ex Benth. | Antirhea Comm. ex Juss. | | | Guettardella Champ. ex Benth. | Antirhea Comm. ex Juss. | Rubiaceae |
| Gyrostipula J.-F. Leroy | | a | | Gyrostipula J.-F. Leroy | | Rubiaceae |
| Habroneuron Standl. | | a | | Habroneuron Standl. | | Rubiaceae |
| Habsia Steud. | Guettarda L. | | | Habsia Steud. | Guettarda L. | Rubiaceae |
| Haldina Ridsdale | | a | | Haldina Ridsdale | | Rubiaceae |
| Halesia P. Browne | Guettarda L. | | | Halesia P. Browne | Guettarda L. | Rubiaceae |
| Hamelia Jacq. | | a | | Hamelia Jacq. | | Rubiaceae |
| Heliospora Hook. f., orth. var. | Timonius DC. | | | Heliospora Hook. f., orth. var. | Timonius DC. | Rubiaceae |
| Helospora Jack | Timonius DC. | | | Helospora Jack | Timonius DC. | Rubiaceae |
| Herrera Adans. | Erithalis P. Browne | | | Herrera Adans. | Erithalis P. Browne | Rubiaceae |
| Higginsia Pers. | Hoffmannia Sw. | | | Higginsia Pers. | Hoffmannia Sw. | Rubiaceae |
| Hillia Jacq. | | a | | Hillia Jacq. | | Rubiaceae |
| Hintonia Bullock | | a | | Hintonia Bullock | | Rubiaceae |
| Hodgkinsonia F. Muell. | | a | | Hodgkinsonia F. Muell. | | Rubiaceae |
| Hoffmannia Sw. | | a | | Hoffmannia Sw. | | Rubiaceae |
| Hymenodictyon Wall. | | a | | Hymenodictyon Wall. | | Rubiaceae |
| Isartia Dumort., orth. var. | Isertia Schreb. | | | Isartia Dumort., orth. var. | Isertia Schreb. | Rubiaceae |
| Isertia Schreb. | | a | | Isertia Schreb. | | Rubiaceae |
| Isertia Schreb. sect. Cassupa | | a | i | Isertia Schreb. sect. Cassupa | | Rubiaceae |
| Isertia Schreb. sect. Isertia | | a | i | Isertia Schreb. sect. Isertia | | Rubiaceae |
| Isidorea A. Rich. ex DC. | | a | | Isidorea A. Rich. ex DC. | | Rubiaceae |
| Jangaraca Raf. | Hamelia Jacq. | | | Jangaraca Raf. | Hamelia Jacq. | Rubiaceae |
| Janotia J.-F. Leroy | | a | | Janotia J.-F. Leroy | | Rubiaceae |
| Javorkaea Borhidi & Járai-Koml. | Rondeletia L. | | | Javorkaea Borhidi & Járai-Koml. | Rondeletia L. | Rubiaceae |
| Joosia H. Karst. | | a | | Joosia H. Karst. | | Rubiaceae |
| Kerianthera J. H. Kirkbr. | | a | | Kerianthera J. H. Kirkbr. | | Rubiaceae |
| Kinkina Adans. | Cinchona L. | | | Kinkina Adans. | Cinchona L. | Rubiaceae |
| Koehneago Kuntze | Hoffmannia Sw. | | | Koehneago Kuntze | Hoffmannia Sw. | Rubiaceae |
| Kurria Hochst. ex Steud. | Hymenodictyon Wall. | | | Kurria Hochst. ex Steud. | Hymenodictyon Wall. | Rubiaceae |
| Ladenbergia Klotzsch | | a | | Ladenbergia Klotzsch | | Rubiaceae |
| Laugeria L., orth. var. | Guettarda L. | | | Laugeria L., orth. var. | Guettarda L. | Rubiaceae |
| Laugeria Vahl ex Hook. f. | Neolaugeria Nicolson | | | Laugeria Vahl ex Hook. f. | Neolaugeria Nicolson | Rubiaceae |
| Laugieria Jacq. | Guettarda L. | | | Laugieria Jacq. | Guettarda L. | Rubiaceae |
| Lightfootia Schreb. | Rondeletia L. | | | Lightfootia Schreb. | Rondeletia L. | Rubiaceae |
| Lorencea Borhidi | | a | | Lorencea Borhidi | | Rubiaceae |
| Ludekia Ridsdale | | a | | Ludekia Ridsdale | | Rubiaceae |
| Machaonia Humb. & Bonpl. | | a | | Machaonia Humb. & Bonpl. | | Rubiaceae |
| Malanea Aubl. | | a | | Malanea Aubl. | | Rubiaceae |
| Mamboga Blanco | Mitragyna Korth. | | | Mamboga Blanco | Mitragyna Korth. | Rubiaceae |
| Matthiola L. | Guettarda L. | | | Matthiola L. | Guettarda L. | Rubiaceae |
| Mazaea Krug & Urb. | | a | | Mazaea Krug & Urb. | | Rubiaceae |
| Melanea Pers., orth. var. | Malanea Aubl. | | | Melanea Pers., orth. var. | Malanea Aubl. | Rubiaceae |
| Metadina Bakh. f. | | a | | Metadina Bakh. f. | | Rubiaceae |
| Microsplenium Hook. f., nom. inval. | Machaonia Humb. & Bonpl. | | | Microsplenium Hook. f., nom. inval. | Machaonia Humb. & Bonpl. | Rubiaceae |
| Mitragyna Korth. | | a | | Mitragyna Korth. | | Rubiaceae |
| Morierina Vieill. | | a | | Morierina Vieill. | | Rubiaceae |
| Myrmeconauclea Merr. | | a | | Myrmeconauclea Merr. | | Rubiaceae |
| Nauclea L. | | a | | Nauclea L. | | Rubiaceae |
| Neoblakea Standl. | | a | | Neoblakea Standl. | | Rubiaceae |
| Neobreonia Ridsdale | Breonia A. Rich. ex DC. | | | Neobreonia Ridsdale | Breonia A. Rich. ex DC. | Rubiaceae |
| Neolamarckia Bosser | | a | | Neolamarckia Bosser | | Rubiaceae |
| Neolaugeria Nicolson | | a | | Neolaugeria Nicolson | | Rubiaceae |
| Neomazaea Krug & Urb. | Mazaea Krug & Urb. | | | Neomazaea Krug & Urb. | Mazaea Krug & Urb. | Rubiaceae |
| Neonauclea Merr. | | a | | Neonauclea Merr. | | Rubiaceae |
| Obbea Hook. f. | Bobea Gaudich. | | | Obbea Hook. f. | Bobea Gaudich. | Rubiaceae |
| Ochreinauclea Ridsdale & Bakh. f. | | a | | Ochreinauclea Ridsdale & Bakh. f. | | Rubiaceae |
| Ohigginsia Ruiz & Pav. | Hoffmannia Sw. | | | Ohigginsia Ruiz & Pav. | Hoffmannia Sw. | Rubiaceae |
| Omiltemia Standl. | | a | | Omiltemia Standl. | | Rubiaceae |
| Osa Aiello | | a | | Osa Aiello | | Rubiaceae |
| Ourouparia Aubl. | Uncaria Schreb. | | | Ourouparia Aubl. | Uncaria Schreb. | Rubiaceae |
| Outarda Dumort., orth. var. | Coutarea Aubl. | | | Outarda Dumort., orth. var. | Coutarea Aubl. | Rubiaceae |
| Paracorynanthe Capuron | | a | | Paracorynanthe Capuron | | Rubiaceae |
| Paradina Pierre ex Pit. | Mitragyna Korth. | | | Paradina Pierre ex Pit. | Mitragyna Korth. | Rubiaceae |
| Patsjotti Adans. | Strumpfia Jacq. | | | Patsjotti Adans. | Strumpfia Jacq. | Rubiaceae |
| Pausinystalia Pierre ex Beille | | a | | Pausinystalia Pierre ex Beille | | Rubiaceae |
| Pertusadina Ridsdale | | a | | Pertusadina Ridsdale | | Rubiaceae |
| Peteria Raf., orth. var. | Rondeletia L. | | | Peteria Raf., orth. var. | Rondeletia L. | Rubiaceae |
| Petesia P. Browne | Rondeletia L. | | | Petesia P. Browne | Rondeletia L. | Rubiaceae |
| Phialanthus Griseb. | | a | | Phialanthus Griseb. | | Rubiaceae |
| Phosanthus Raf., nom. inval. | Isertia Schreb. | | | Phosanthus Raf., nom. inval. | Isertia Schreb. | Rubiaceae |
| Phyllacantha Hook. f., orth. var. | Phyllacanthus Hook. f. | | | Phyllacantha Hook. f., orth. var. | Phyllacanthus Hook. f. | Rubiaceae |
| Phyllacanthus Hook. f. | | a | | Phyllacanthus Hook. f. | | Rubiaceae |
| Phyllomelia Griseb. | | a | | Phyllomelia Griseb. | | Rubiaceae |
| Pimentelia Wedd. | | a | | Pimentelia Wedd. | | Rubiaceae |
| Pittoniotis Griseb. | | a | | Pittoniotis Griseb. | | Rubiaceae |
| Platanocarpum Korth. | Nauclea L. | | | Platanocarpum Korth. | Nauclea L. | Rubiaceae |
| Platanocephalus Crantz | Nauclea L. | | | Platanocephalus Crantz | Nauclea L. | Rubiaceae |
| Pleurocarpus Klotzsch | Cinchona L. | | | Pleurocarpus Klotzsch | Cinchona L. | Rubiaceae |
| Plocaniophyllon Brandegee | Deppea Cham. & Schltdl. | | | Plocaniophyllon Brandegee | Deppea Cham. & Schltdl. | Rubiaceae |
| Polyphragmon Desf. | Timonius DC. | | | Polyphragmon Desf. | Timonius DC. | Rubiaceae |
| Porocarpus Gaertn. | Timonius DC. | | | Porocarpus Gaertn. | Timonius DC. | Rubiaceae |
| Portlandia P. Browne | | a | | Portlandia P. Browne | | Rubiaceae |
| Pseudocinchona A. Chev. | | a | | Pseudocinchona A. Chev. | | Rubiaceae |
| Quinquina Boehm. | Cinchona L. | | | Quinquina Boehm. | Cinchona L. | Rubiaceae |
| Rachicallis DC. | | a | | Rachicallis DC. | | Rubiaceae |
| Ravnia Oerst. | Hillia Jacq. | | | Ravnia Oerst. | Hillia Jacq. | Rubiaceae |
| Remijia DC. | | a | | Remijia DC. | | Rubiaceae |
| Restiaria Lour. | Uncaria Schreb. | | | Restiaria Lour. | Uncaria Schreb. | Rubiaceae |
| Rhachicallis DC., orth. var. | Rachicallis DC. | | | Rhachicallis DC., orth. var. | Rachicallis DC. | Rubiaceae |
| Rhytidotus Hook. f., orth. var. | Bobea Gaudich. | | | Rhytidotus Hook. f., orth. var. | Bobea Gaudich. | Rubiaceae |
| Rogiera Planch. | Rondeletia L. | | | Rogiera Planch. | Rondeletia L. | Rubiaceae |
| Roigella Borhidi & M. Fernández | | a | | Roigella Borhidi & M. Fernández | | Rubiaceae |
| Rondeletia L. | | a | | Rondeletia L. | | Rubiaceae |
| Rovaeanthus Borhidi et al. | | a | | Rovaeanthus Borhidi et al. | | Rubiaceae |
| Rytidotus Hook. f. | Bobea Gaudich. | | | Rytidotus Hook. f. | Bobea Gaudich. | Rubiaceae |
| Sacconia Endl. | Chione DC. | | | Sacconia Endl. | Chione DC. | Rubiaceae |
| Saldanha Vell. | Hillia Jacq. | | | Saldanha Vell. | Hillia Jacq. | Rubiaceae |
| Salzmannia DC. | | a | | Salzmannia DC. | | Rubiaceae |
| Sarcocephalus Afzel. ex Sabine | | a | | Sarcocephalus Afzel. ex Sabine | | Rubiaceae |
| Sardinia Vell. | Guettarda L. | | | Sardinia Vell. | Guettarda L. | Rubiaceae |
| Schenckia K. Schum. | Deppea Cham. & Schltdl. | | | Schenckia K. Schum. | Deppea Cham. & Schltdl. | Rubiaceae |
| Schiedea A. Rich. | Machaonia Humb. & Bonpl. | | | Schiedea A. Rich. | Machaonia Humb. & Bonpl. | Rubiaceae |
| Schmidtottia Urb. | | a | | Schmidtottia Urb. | | Rubiaceae |
| Scolosanthus Vahl | | a | | Scolosanthus Vahl | | Rubiaceae |
| Siemensia Urb. | | a | | Siemensia Urb. | | Rubiaceae |
| Sinoadina Ridsdale | | a | | Sinoadina Ridsdale | | Rubiaceae |
| Siphonandra Turcz. | Chiococca P. Browne | | | Siphonandra Turcz. | Chiococca P. Browne | Rubiaceae |
| Solenandra Hook. f. | Exostema (Pers.) Humb. & Bonpl. | | | Solenandra Hook. f. | Exostema (Pers.) Humb. & Bonpl. | Rubiaceae |
| Stenostomum C. F. Gaertn. | | a | | Stenostomum C. F. Gaertn. | | Rubiaceae |
| Stephegyne Korth. | Mitragyna Korth. | | | Stephegyne Korth. | Mitragyna Korth. | Rubiaceae |
| Steudelago Kuntze | Exostema (Pers.) Humb. & Bonpl. | | | Steudelago Kuntze | Exostema (Pers.) Humb. & Bonpl. | Rubiaceae |
| Stevensia Poit. | | a | | Stevensia Poit. | | Rubiaceae |
| Stilpnophyllum Hook. f. | | a | | Stilpnophyllum Hook. f. | | Rubiaceae |
| Strumpfia Jacq. | | a | | Strumpfia Jacq. | | Rubiaceae |
| Sturmia C. F. Gaertn. | Antirhea Comm. ex Juss. | | | Sturmia C. F. Gaertn. | Antirhea Comm. ex Juss. | Rubiaceae |
| Suberanthus Borhidi & M. Fernández | | a | | Suberanthus Borhidi & M. Fernández | | Rubiaceae |
| Tangaraca Adans. | Hamelia Jacq. | | | Tangaraca Adans. | Hamelia Jacq. | Rubiaceae |
| Tatea Seem. | Bikkia Reinw. | | | Tatea Seem. | Bikkia Reinw. | Rubiaceae |
| Tepesia C. F. Gaertn. | Hamelia Jacq. | | | Tepesia C. F. Gaertn. | Hamelia Jacq. | Rubiaceae |
| Terebraria Sessé ex Kunth | Neolaugeria Nicolson | | | Terebraria Sessé ex Kunth | Neolaugeria Nicolson | Rubiaceae |
| Tertrea DC. | Machaonia Humb. & Bonpl. | | | Tertrea DC. | Machaonia Humb. & Bonpl. | Rubiaceae |
| Thiollierea Montrouz. | Bikkia Reinw. | | | Thiollierea Montrouz. | Bikkia Reinw. | Rubiaceae |
| Timonius DC. | | a | | Timonius DC. | | Rubiaceae |
| Tournefortiopsis Rusby | Guettarda L. | | | Tournefortiopsis Rusby | Guettarda L. | Rubiaceae |
| Uncaria Schreb. | | a | | Uncaria Schreb. | | Rubiaceae |
| Uncinaria Rchb., orth. var. | Uncaria Schreb. | | | Uncinaria Rchb., orth. var. | Uncaria Schreb. | Rubiaceae |
| Uruparia Raf. | Uncaria Schreb. | | | Uruparia Raf. | Uncaria Schreb. | Rubiaceae |
| Viviania Raf. | Guettarda L. | | | Viviania Raf. | Guettarda L. | Rubiaceae |
| Wandersong David W. Taylor | | a | | Wandersong David W. Taylor | | Rubiaceae |
| Willdenovia J. F. Gmel. | Rondeletia L. | | | Willdenovia J. F. Gmel. | Rondeletia L. | Rubiaceae |
| Xerococcus Oerst. | | a | | Xerococcus Oerst. | | Rubiaceae |
| Yutajea Steyerm. | | a | | Yutajea Steyerm. | | Rubiaceae |
| Zalmaria Raf. | Rondeletia L. | | | Zalmaria Raf. | Rondeletia L. | Rubiaceae |