| Acamptopappus (A. Gray) A. Gray | | a | | Acamptopappus (A. Gray) A. Gray | | Asteraceae |
| Achaetogeron A. Gray | Erigeron L. | | | Achaetogeron A. Gray | Erigeron L. | Asteraceae |
| Achnophora F. Muell. | | a | | Achnophora F. Muell. | | Asteraceae |
| Achyrobaccharis Sch. Bip. ex Walp. | Baccharis L. | | | Achyrobaccharis Sch. Bip. ex Walp. | Baccharis L. | Asteraceae |
| Afroaster J. C. Manning & Goldblatt | | a | | Afroaster J. C. Manning & Goldblatt | | Asteraceae |
| Agathaea Cass. | Felicia Cass. | | | Agathaea Cass. | Felicia Cass. | Asteraceae |
| Akeassia Lebrun & Stork | | a | | Akeassia Lebrun & Stork | | Asteraceae |
| Allittia P. S. Short | | a | | Allittia P. S. Short | | Asteraceae |
| Almutaster Á. Löve & D. Löve | | a | | Almutaster Á. Löve & D. Löve | | Asteraceae |
| Amellus L. | | a | | Amellus L. | | Asteraceae |
| Ammodia Nutt. | Heterotheca Cass. | | | Ammodia Nutt. | Heterotheca Cass. | Asteraceae |
| Ampelaster G. L. Nesom | | a | | Ampelaster G. L. Nesom | | Asteraceae |
| Amphiachyris (A. DC.) Nutt. | | a | | Amphiachyris (A. DC.) Nutt. | | Asteraceae |
| Amphipappus Torr. & A. Gray | | a | | Amphipappus Torr. & A. Gray | | Asteraceae |
| Amphirhapis DC. | Aster L. | | | Amphirhapis DC. | Aster L. | Asteraceae |
| Aphanostephus DC. | Erigeron L. | | | Aphanostephus DC. | Erigeron L. | Asteraceae |
| Aphantochaeta A. Gray | Chaetopappa DC. | | | Aphantochaeta A. Gray | Chaetopappa DC. | Asteraceae |
| Apodocephala Baker | | a | | Apodocephala Baker | | Asteraceae |
| Apopyros G. L. Nesom | Erigeron L. | | | Apopyros G. L. Nesom | Erigeron L. | Asteraceae |
| Archibaccharis Heering | | a | | Archibaccharis Heering | | Asteraceae |
| Arctogeron DC. | | a | | Arctogeron DC. | | Asteraceae |
| Arida (R. L. Hartm.) D. R. Morgan & R. L. Hartm. | | a | | Arida (R. L. Hartm.) D. R. Morgan & R. L. Hartm. | | Asteraceae |
| Aster L. | | a | | Aster L. | | Asteraceae |
| Asteromoea Blume | Aster L. | | | Asteromoea Blume | Aster L. | Asteraceae |
| Asteropsis Less. | | a | | Asteropsis Less. | | Asteraceae |
| Asterothamnus Novopokr. | | a | | Asterothamnus Novopokr. | | Asteraceae |
| Astranthium Nutt. | | a | | Astranthium Nutt. | | Asteraceae |
| Aylacophora Cabrera | | a | | Aylacophora Cabrera | | Asteraceae |
| Aztecaster G. L. Nesom | | a | | Aztecaster G. L. Nesom | | Asteraceae |
| Baccharidastrum Cabrera | Baccharis L. | | | Baccharidastrum Cabrera | Baccharis L. | Asteraceae |
| Baccharidiopsis G. M. Barroso | Aster L. | | | Baccharidiopsis G. M. Barroso | Aster L. | Asteraceae |
| Baccharis L. | | a | | Baccharis L. | | Asteraceae |
| Batopilasia G. L. Nesom & Noyes | | a | | Batopilasia G. L. Nesom & Noyes | | Asteraceae |
| Bellidastrum Scop., orth. var. | Bellidiastrum Scop. | | | Bellidastrum Scop., orth. var. | Bellidiastrum Scop. | Asteraceae |
| Bellidiastrum Scop. | | a | | Bellidiastrum Scop. | | Asteraceae |
| Bellis L. | | a | | Bellis L. | | Asteraceae |
| Bellium L. | | a | | Bellium L. | | Asteraceae |
| Benitoa D. D. Keck | Lessingia Cham. | | | Benitoa D. D. Keck | Lessingia Cham. | Asteraceae |
| Bigelowia DC. | | a | | Bigelowia DC. | | Asteraceae |
| Biotia DC. | Eurybia (Cass.) Cass. | | | Biotia DC. | Eurybia (Cass.) Cass. | Asteraceae |
| Blakiella Cuatrec. | | a | | Blakiella Cuatrec. | | Asteraceae |
| Boltonia LʼHér. | | a | | Boltonia LʼHér. | | Asteraceae |
| Borkonstia Ignatov | Aster L. | | | Borkonstia Ignatov | Aster L. | Asteraceae |
| Bourdonia Greene | Chaetopappa DC. | | | Bourdonia Greene | Chaetopappa DC. | Asteraceae |
| Brachyactis Ledeb. | | a | | Brachyactis Ledeb. | | Asteraceae |
| Brachychaeta Torr. & A. Gray | Solidago L. | | | Brachychaeta Torr. & A. Gray | Solidago L. | Asteraceae |
| Brachycome Cass., orth. var. | Brachyscome Cass. | | | Brachycome Cass., orth. var. | Brachyscome Cass. | Asteraceae |
| Brachyris Nutt. | Gutierrezia Lag. | | | Brachyris Nutt. | Gutierrezia Lag. | Asteraceae |
| Brachyscome Cass. | | a | | Brachyscome Cass. | | Asteraceae |
| Bradburia Torr. & A. Gray | Chrysopsis (Nutt.) Elliott | | | Bradburia Torr. & A. Gray | Chrysopsis (Nutt.) Elliott | Asteraceae |
| Brintonia Greene | | a | | Brintonia Greene | | Asteraceae |
| Cabreraea Bonifacino | | a | | Cabreraea Bonifacino | | Asteraceae |
| Calimeris Nees, orth. var. | Aster L. | | | Calimeris Nees, orth. var. | Aster L. | Asteraceae |
| Callistemma Cass. | Callistephus Cass. | | | Callistemma Cass. | Callistephus Cass. | Asteraceae |
| Callistephus Cass. | | a | | Callistephus Cass. | | Asteraceae |
| Calotis R. Br. | | a | | Calotis R. Br. | | Asteraceae |
| Camptacra N. T. Burb. | | a | | Camptacra N. T. Burb. | | Asteraceae |
| Canadanthus G. L. Nesom | | a | | Canadanthus G. L. Nesom | | Asteraceae |
| Celmisia Cass. | | a | | Celmisia Cass. | | Asteraceae |
| Ceratogyne Turcz. | | a | | Ceratogyne Turcz. | | Asteraceae |
| Ceruana Forssk. | | a | | Ceruana Forssk. | | Asteraceae |
| Chaetopappa DC. | | a | | Chaetopappa DC. | | Asteraceae |
| Chamaegeron Schrenk | | a | | Chamaegeron Schrenk | | Asteraceae |
| Charieis Cass. | Felicia Cass. | | | Charieis Cass. | Felicia Cass. | Asteraceae |
| Cheiroloma F. Muell. | Calotis R. Br. | | | Cheiroloma F. Muell. | Calotis R. Br. | Asteraceae |
| Chihuahuana Urbatsch & R. P. Roberts | | a | | Chihuahuana Urbatsch & R. P. Roberts | | Asteraceae |
| Chiliophyllum Phil. | | a | | Chiliophyllum Phil. | | Asteraceae |
| Chiliotrichiopsis Cabrera | | a | | Chiliotrichiopsis Cabrera | | Asteraceae |
| Chiliotrichum Cass. | | a | | Chiliotrichum Cass. | | Asteraceae |
| Chlamydites J. R. Drumm. | Aster L. | | | Chlamydites J. R. Drumm. | Aster L. | Asteraceae |
| Chloracantha G. L. Nesom et al. | | a | | Chloracantha G. L. Nesom et al. | | Asteraceae |
| Chrysocoma L. | | a | | Chrysocoma L. | | Asteraceae |
| Chrysoma Nutt. | | a | | Chrysoma Nutt. | | Asteraceae |
| Chrysopsis (Nutt.) Elliott | | a | | Chrysopsis (Nutt.) Elliott | | Asteraceae |
| Chrysothamnus Nutt. | | a | | Chrysothamnus Nutt. | | Asteraceae |
| Colobanthera Humbert | | a | | Colobanthera Humbert | | Asteraceae |
| Columbiadoria G. L. Nesom | | a | | Columbiadoria G. L. Nesom | | Asteraceae |
| Commidendrum Burch. ex DC. | | a | | Commidendrum Burch. ex DC. | | Asteraceae |
| Conyza Less. | Erigeron L. | | | Conyza Less. | Erigeron L. | Asteraceae |
| Conyzanthus Tamamsch. | Aster L. | | | Conyzanthus Tamamsch. | Aster L. | Asteraceae |
| Corethrogyne DC. | | a | | Corethrogyne DC. | | Asteraceae |
| Crinitaria Cass. | Galatella Cass. | | | Crinitaria Cass. | Galatella Cass. | Asteraceae |
| Crinitina Soják | Galatella Cass. | | | Crinitina Soják | Galatella Cass. | Asteraceae |
| Croptilon Raf. | | a | | Croptilon Raf. | | Asteraceae |
| Cuniculotinus Urbatsch et al. | | a | | Cuniculotinus Urbatsch et al. | | Asteraceae |
| Cyathocline Cass. | | a | | Cyathocline Cass. | | Asteraceae |
| Dacryotrichia Wild | | a | | Dacryotrichia Wild | | Asteraceae |
| Damnamenia Given | | a | | Damnamenia Given | | Asteraceae |
| Darwiniothamnus Harling | Erigeron L. | | | Darwiniothamnus Harling | Erigeron L. | Asteraceae |
| Dichaetophora A. Gray | | a | | Dichaetophora A. Gray | | Asteraceae |
| Dichrocephala LʼHér. ex DC. | | a | | Dichrocephala LʼHér. ex DC. | | Asteraceae |
| Dichromochlamys Dunlop | | a | | Dichromochlamys Dunlop | | Asteraceae |
| Dieteria Nutt. | | a | | Dieteria Nutt. | | Asteraceae |
| Dimorphocoma F. Muell. & Tate | | a | | Dimorphocoma F. Muell. & Tate | | Asteraceae |
| Diplopappus Cass. | Chrysopsis (Nutt.) Elliott | | | Diplopappus Cass. | Chrysopsis (Nutt.) Elliott | Asteraceae |
| Diplostephium Kunth | | a | | Diplostephium Kunth | | Asteraceae |
| Distasis DC. | Chaetopappa DC. | | | Distasis DC. | Chaetopappa DC. | Asteraceae |
| Doellingeria Nees | | a | | Doellingeria Nees | | Asteraceae |
| Eastwoodia Brandegee | | a | | Eastwoodia Brandegee | | Asteraceae |
| Egletes Cass. | | a | | Egletes Cass. | | Asteraceae |
| Elachanthus F. Muell. | | a | | Elachanthus F. Muell. | | Asteraceae |
| Engleria O. Hoffm. | | a | | Engleria O. Hoffm. | | Asteraceae |
| Eremiastrum A. Gray | Monoptilon Torr. & A. Gray | | | Eremiastrum A. Gray | Monoptilon Torr. & A. Gray | Asteraceae |
| Ericameria Nutt. | | a | | Ericameria Nutt. | | Asteraceae |
| Erigeron L. | | a | | Erigeron L. | | Asteraceae |
| Eriocarpum Nutt. | Machaeranthera Nees | | | Eriocarpum Nutt. | Machaeranthera Nees | Asteraceae |
| Erodiophyllum F. Muell. | | a | | Erodiophyllum F. Muell. | | Asteraceae |
| Eucephalus Nutt. | | a | | Eucephalus Nutt. | | Asteraceae |
| Eurybia (Cass.) Cass. | | a | | Eurybia (Cass.) Cass. | | Asteraceae |
| Eurybiopsis DC. | | a | | Eurybiopsis DC. | | Asteraceae |
| Euthamia (Nutt.) Cass. | | a | | Euthamia (Nutt.) Cass. | | Asteraceae |
| Felicia Cass. | | a | | Felicia Cass. | | Asteraceae |
| Floscaldasia Cuatrec. | | a | | Floscaldasia Cuatrec. | | Asteraceae |
| Flosmutisia Cuatrec. | | a | | Flosmutisia Cuatrec. | | Asteraceae |
| Formania W. W. Sm. & Small | | a | | Formania W. W. Sm. & Small | | Asteraceae |
| Galatella Cass. | | a | | Galatella Cass. | | Asteraceae |
| Geissolepis B. L. Rob. | | a | | Geissolepis B. L. Rob. | | Asteraceae |
| Glycideras DC. | Psiadia Jacq. ex Willd. | | | Glycideras DC. | Psiadia Jacq. ex Willd. | Asteraceae |
| Grangea Adans. | | a | | Grangea Adans. | | Asteraceae |
| Grangeopsis Humbert | | a | | Grangeopsis Humbert | | Asteraceae |
| Grauanthus Fayed | | a | | Grauanthus Fayed | | Asteraceae |
| Greenella A. Gray | Gutierrezia Lag. | | | Greenella A. Gray | Gutierrezia Lag. | Asteraceae |
| Grindelia Willd. | | a | | Grindelia Willd. | | Asteraceae |
| Gundlachia A. Gray | | a | | Gundlachia A. Gray | | Asteraceae |
| Gutierrezia Lag. | | a | | Gutierrezia Lag. | | Asteraceae |
| Guynesomia Bonifacino & G. Sancho | | a | | Guynesomia Bonifacino & G. Sancho | | Asteraceae |
| Gymnosperma Less. | | a | | Gymnosperma Less. | | Asteraceae |
| Gymnostephium Less. | | a | | Gymnostephium Less. | | Asteraceae |
| Gyrodoma Wild | | a | | Gyrodoma Wild | | Asteraceae |
| Haplopappus Cass. | | a | | Haplopappus Cass. | | Asteraceae |
| Haroldia Bonifacino | | a | | Haroldia Bonifacino | | Asteraceae |
| Hazardia Greene | | a | | Hazardia Greene | | Asteraceae |
| Hemiachyris DC. | Gutierrezia Lag. | | | Hemiachyris DC. | Gutierrezia Lag. | Asteraceae |
| Henricia Cass. | Psiadia Jacq. ex Willd. | | | Henricia Cass. | Psiadia Jacq. ex Willd. | Asteraceae |
| Herrickia Wooton & Standl. | | a | | Herrickia Wooton & Standl. | | Asteraceae |
| Hesperodoria Greene | | a | | Hesperodoria Greene | | Asteraceae |
| Heterochaeta DC. | Aster L. | | | Heterochaeta DC. | Aster L. | Asteraceae |
| Heteromma Benth. | | a | | Heteromma Benth. | | Asteraceae |
| Heteropappus Less. | Aster L. | | | Heteropappus Less. | Aster L. | Asteraceae |
| Heteroplexis C. C. Chang | | a | | Heteroplexis C. C. Chang | | Asteraceae |
| Heterothalamus Less. | | a | | Heterothalamus Less. | | Asteraceae |
| Heterotheca Cass. | | a | | Heterotheca Cass. | | Asteraceae |
| Hinterhubera Sch. Bip. ex Wedd. | | a | | Hinterhubera Sch. Bip. ex Wedd. | | Asteraceae |
| Homopappus Nutt. | Haplopappus Cass. | | | Homopappus Nutt. | Haplopappus Cass. | Asteraceae |
| Hoorebekia Cornel. | Grindelia Willd. | | | Hoorebekia Cornel. | Grindelia Willd. | Asteraceae |
| Hullsia P. S. Short | | a | | Hullsia P. S. Short | | Asteraceae |
| Hysterionica Willd. | Erigeron L. | | | Hysterionica Willd. | Erigeron L. | Asteraceae |
| Inulopsis O. Hoffm. | | a | | Inulopsis O. Hoffm. | | Asteraceae |
| Ionactis Greene | | a | | Ionactis Greene | | Asteraceae |
| Iotasperma G. L. Nesom | | a | | Iotasperma G. L. Nesom | | Asteraceae |
| Isocoma Nutt. | | a | | Isocoma Nutt. | | Asteraceae |
| Isoetopsis Turcz. | | a | | Isoetopsis Turcz. | | Asteraceae |
| Isopappus Torr. & A. Gray | Croptilon Raf. | | | Isopappus Torr. & A. Gray | Croptilon Raf. | Asteraceae |
| Ixiochlamys F. Muell. & Sond. | | a | | Ixiochlamys F. Muell. & Sond. | | Asteraceae |
| Jeffreya Wild | | a | | Jeffreya Wild | | Asteraceae |
| Kalimeris (Cass.) Cass. | Aster L. | | | Kalimeris (Cass.) Cass. | Aster L. | Asteraceae |
| Katinasia Bonifacino | | a | | Katinasia Bonifacino | | Asteraceae |
| Keysseria Lauterb. | | a | | Keysseria Lauterb. | | Asteraceae |
| Kippistia F. Muell. | | a | | Kippistia F. Muell. | | Asteraceae |
| Kitamuraea Rauschert | Aster L. | | | Kitamuraea Rauschert | Aster L. | Asteraceae |
| Kitamuraster Soják | Aster L. | | | Kitamuraster Soják | Aster L. | Asteraceae |
| Lachnophyllum Bunge | | a | | Lachnophyllum Bunge | | Asteraceae |
| Laennecia Cass. | | a | | Laennecia Cass. | | Asteraceae |
| Laestadia Kunth ex Less. | | a | | Laestadia Kunth ex Less. | | Asteraceae |
| Lagenifera Cass., orth. var. | Lagenophora Cass. | | | Lagenifera Cass., orth. var. | Lagenophora Cass. | Asteraceae |
| Lagenithrix G. L. Nesom | Pappochroma Raf. | | | Lagenithrix G. L. Nesom | Pappochroma Raf. | Asteraceae |
| Lagenopappus G. L. Nesom | Pappochroma Raf. | | | Lagenopappus G. L. Nesom | Pappochroma Raf. | Asteraceae |
| Lagenophora Cass. | | a | | Lagenophora Cass. | | Asteraceae |
| Lasallea Greene | Aster L. | | | Lasallea Greene | Aster L. | Asteraceae |
| Lepidophyllum Cass. | | a | | Lepidophyllum Cass. | | Asteraceae |
| Leptostelma D. Don | Erigeron L. | | | Leptostelma D. Don | Erigeron L. | Asteraceae |
| Lessingia Cham. | | a | | Lessingia Cham. | | Asteraceae |
| Leucelene Greene | Chaetopappa DC. | | | Leucelene Greene | Chaetopappa DC. | Asteraceae |
| Leucopsidium Charpent. ex DC. | Erigeron L. | | | Leucopsidium Charpent. ex DC. | Erigeron L. | Asteraceae |
| Leucopsis (DC.) Baker | Noticastrum DC. | | | Leucopsis (DC.) Baker | Noticastrum DC. | Asteraceae |
| Leucosyris Greene | Chloracantha G. L. Nesom et al. | | | Leucosyris Greene | Chloracantha G. L. Nesom et al. | Asteraceae |
| Linosyris Cass. | Aster L. | | | Linosyris Cass. | Aster L. | Asteraceae |
| Llerasia Triana | | a | | Llerasia Triana | | Asteraceae |
| Lorandersonia Urbatsch et al. | | a | | Lorandersonia Urbatsch et al. | | Asteraceae |
| Machaeranthera Nees | | a | | Machaeranthera Nees | | Asteraceae |
| Macronema Nutt. | Ericameria Nutt. | | | Macronema Nutt. | Ericameria Nutt. | Asteraceae |
| Madagaster G. L. Nesom | | a | | Madagaster G. L. Nesom | | Asteraceae |
| Mairia Nees | | a | | Mairia Nees | | Asteraceae |
| Medranoa Urbatsch & R. P. Roberts | | a | | Medranoa Urbatsch & R. P. Roberts | | Asteraceae |
| Melanodendron DC. | | a | | Melanodendron DC. | | Asteraceae |
| Microglossa DC. | | a | | Microglossa DC. | | Asteraceae |
| Microgyne Less. | | a | | Microgyne Less. | | Asteraceae |
| Microgynella Grau | Microgyne Less. | | | Microgynella Grau | Microgyne Less. | Asteraceae |
| Microtrichia DC. | Grangea Adans. | | | Microtrichia DC. | Grangea Adans. | Asteraceae |
| Minuria DC. | | a | | Minuria DC. | | Asteraceae |
| Miyamayomena Kitam. | Aster L. | | | Miyamayomena Kitam. | Aster L. | Asteraceae |
| Molina Ruiz & Pav. | Baccharis L. | | | Molina Ruiz & Pav. | Baccharis L. | Asteraceae |
| Monoptilon Torr. & A. Gray | | a | | Monoptilon Torr. & A. Gray | | Asteraceae |
| Myriactis Less. | | a | | Myriactis Less. | | Asteraceae |
| Nannoglottis Maxim. | | a | | Nannoglottis Maxim. | | Asteraceae |
| Nardophyllum (Hook. & Arn.) Hook. & Arn. | | a | | Nardophyllum (Hook. & Arn.) Hook. & Arn. | | Asteraceae |
| Neja D. Don | Erigeron L. | | | Neja D. Don | Erigeron L. | Asteraceae |
| Neobrachyactis Brouillet | | a | | Neobrachyactis Brouillet | | Asteraceae |
| Neomolina F. H. Hellwig | Baccharis L. | | | Neomolina F. H. Hellwig | Baccharis L. | Asteraceae |
| Neonesomia Urbatsch & R. P. Roberts | | a | | Neonesomia Urbatsch & R. P. Roberts | | Asteraceae |
| Nesomia B. L. Turner | | a | | Nesomia B. L. Turner | | Asteraceae |
| Nestotus R. P. Roberts et al. | | a | | Nestotus R. P. Roberts et al. | | Asteraceae |
| Nidorella Cass. | | a | | Nidorella Cass. | | Asteraceae |
| Nolletia Cass. | | a | | Nolletia Cass. | | Asteraceae |
| Noticastrum DC. | | a | | Noticastrum DC. | | Asteraceae |
| Novenia S. E. Freire | | a | | Novenia S. E. Freire | | Asteraceae |
| Oclemena Greene | | a | | Oclemena Greene | | Asteraceae |
| Ocyroe Phil. | Nardophyllum (Hook. & Arn.) Hook. & Arn. | | | Ocyroe Phil. | Nardophyllum (Hook. & Arn.) Hook. & Arn. | Asteraceae |
| Olearia Moench | | a | | Olearia Moench | | Asteraceae |
| Oligoneuron Small | Solidago L. | | | Oligoneuron Small | Solidago L. | Asteraceae |
| Olivaea Sch. Bip. ex Benth. | | a | | Olivaea Sch. Bip. ex Benth. | | Asteraceae |
| Oonopsis (Nutt.) Greene | | a | | Oonopsis (Nutt.) Greene | | Asteraceae |
| Oreastrum Greene | Aster L. | | | Oreastrum Greene | Aster L. | Asteraceae |
| Oreochrysum Rydb. | | a | | Oreochrysum Rydb. | | Asteraceae |
| Oreostemma Greene | | a | | Oreostemma Greene | | Asteraceae |
| Oritrophium (Kunth) Cuatrec. | | a | | Oritrophium (Kunth) Cuatrec. | | Asteraceae |
| Osbertia Greene | | a | | Osbertia Greene | | Asteraceae |
| Pachystegia Cheeseman | | a | | Pachystegia Cheeseman | | Asteraceae |
| Pacifigeron G. L. Nesom | | a | | Pacifigeron G. L. Nesom | | Asteraceae |
| Paleaepappus Cabrera | Nardophyllum (Hook. & Arn.) Hook. & Arn. | | | Paleaepappus Cabrera | Nardophyllum (Hook. & Arn.) Hook. & Arn. | Asteraceae |
| Pappochroma Raf. | | a | | Pappochroma Raf. | | Asteraceae |
| Parastrephia Nutt. | | a | | Parastrephia Nutt. | | Asteraceae |
| Pembertonia P. S. Short | | a | | Pembertonia P. S. Short | | Asteraceae |
| Pentachaeta Nutt. | | a | | Pentachaeta Nutt. | | Asteraceae |
| Pentheriella O. Hoffm. & Muschl. | Heteromma Benth. | | | Pentheriella O. Hoffm. & Muschl. | Heteromma Benth. | Asteraceae |
| Peripleura (N. T. Burb.) G. L. Nesom | | a | | Peripleura (N. T. Burb.) G. L. Nesom | | Asteraceae |
| Petradoria Greene | | a | | Petradoria Greene | | Asteraceae |
| Pingraea Cass. | Baccharis L. | | | Pingraea Cass. | Baccharis L. | Asteraceae |
| Piofontia Cuatrec. | | a | | Piofontia Cuatrec. | | Asteraceae |
| Piora J. Kost. | | a | | Piora J. Kost. | | Asteraceae |
| Piqueriella R. M. King & H. Rob. | | a | | Piqueriella R. M. King & H. Rob. | | Asteraceae |
| Pityopsis Nutt. | | a | | Pityopsis Nutt. | | Asteraceae |
| Plagiocheilus Arn. ex DC. | | a | | Plagiocheilus Arn. ex DC. | | Asteraceae |
| Pleurophyllum Hook. f. | | a | | Pleurophyllum Hook. f. | | Asteraceae |
| Podocoma Cass. | | a | | Podocoma Cass. | | Asteraceae |
| Poecilolepis Grau | | a | | Poecilolepis Grau | | Asteraceae |
| Polyarrhena Cass. | | a | | Polyarrhena Cass. | | Asteraceae |
| Polypappus Less. | Baccharis L. | | | Polypappus Less. | Baccharis L. | Asteraceae |
| Printzia Cass. | | a | | Printzia Cass. | | Asteraceae |
| Prionopsis Nutt. | Grindelia Willd. | | | Prionopsis Nutt. | Grindelia Willd. | Asteraceae |
| Pseudobaccharis Cabrera | Baccharis L. | | | Pseudobaccharis Cabrera | Baccharis L. | Asteraceae |
| Psiadia Jacq. ex Willd. | | a | | Psiadia Jacq. ex Willd. | | Asteraceae |
| Psiadiella Humbert | | a | | Psiadiella Humbert | | Asteraceae |
| Psila Phil. | Baccharis L. | | | Psila Phil. | Baccharis L. | Asteraceae |
| Psilactis A. Gray | | a | | Psilactis A. Gray | | Asteraceae |
| Psychrogeton Boiss. | | a | | Psychrogeton Boiss. | | Asteraceae |
| Pteronia L. | | a | | Pteronia L. | | Asteraceae |
| Pyrrocoma Hook. | | a | | Pyrrocoma Hook. | | Asteraceae |
| Pytinicarpa G. L. Nesom | | a | | Pytinicarpa G. L. Nesom | | Asteraceae |
| Rayjacksonia R. L. Hartm. & M. A. Lane | | a | | Rayjacksonia R. L. Hartm. & M. A. Lane | | Asteraceae |
| Remya Hillebr. ex Benth. & Hook. f. | | a | | Remya Hillebr. ex Benth. & Hook. f. | | Asteraceae |
| Rhamphogyne S. Moore | | a | | Rhamphogyne S. Moore | | Asteraceae |
| Rhynchospermum Reinw. | | a | | Rhynchospermum Reinw. | | Asteraceae |
| Rigiopappus A. Gray | | a | | Rigiopappus A. Gray | | Asteraceae |
| Rochonia DC. | | a | | Rochonia DC. | | Asteraceae |
| Roodebergia B. Nord. | | a | | Roodebergia B. Nord. | | Asteraceae |
| Sarcanthemum Cass. | | a | | Sarcanthemum Cass. | | Asteraceae |
| Sericocarpus Nees | | a | | Sericocarpus Nees | | Asteraceae |
| Shawia J. R. Forst. & G. Forst. | Olearia Moench | | | Shawia J. R. Forst. & G. Forst. | Olearia Moench | Asteraceae |
| Sheareria S. Moore | | a | | Sheareria S. Moore | | Asteraceae |
| Sideranthus Nutt. ex Nees | Machaeranthera Nees | | | Sideranthus Nutt. ex Nees | Machaeranthera Nees | Asteraceae |
| Solenogyne Cass. | | a | | Solenogyne Cass. | | Asteraceae |
| Solidago L. | | a | | Solidago L. | | Asteraceae |
| ×Solidaster H. R. Wehrh. | | a | | Solidaster H. R. Wehrh. | | Asteraceae |
| Sommerfeltia Less. | | a | | Sommerfeltia Less. | | Asteraceae |
| Steiroglossa DC. | Brachyscome Cass. | | | Steiroglossa DC. | Brachyscome Cass. | Asteraceae |
| Stenactis Cass. | Erigeron L. | | | Stenactis Cass. | Erigeron L. | Asteraceae |
| Stenotopsis Rydb. | Ericameria Nutt. | | | Stenotopsis Rydb. | Ericameria Nutt. | Asteraceae |
| Stenotus Nutt. | | a | | Stenotus Nutt. | | Asteraceae |
| Stephanodoria Greene | | a | | Stephanodoria Greene | | Asteraceae |
| Symphyotrichum Nees | | a | | Symphyotrichum Nees | | Asteraceae |
| Tetramolopium Nees | | a | | Tetramolopium Nees | | Asteraceae |
| Thespis DC. | | a | | Thespis DC. | | Asteraceae |
| Thurovia Rose | | a | | Thurovia Rose | | Asteraceae |
| Toiyabea R. P. Roberts et al. | | a | | Toiyabea R. P. Roberts et al. | | Asteraceae |
| Tolbonia Kuntze | Calotis R. Br. | | | Tolbonia Kuntze | Calotis R. Br. | Asteraceae |
| Tomentaurum G. L. Nesom | | a | | Tomentaurum G. L. Nesom | | Asteraceae |
| Tonestus A. Nelson | | a | | Tonestus A. Nelson | | Asteraceae |
| Townsendia Hook. | | a | | Townsendia Hook. | | Asteraceae |
| Tracyina S. F. Blake | | a | | Tracyina S. F. Blake | | Asteraceae |
| Trimorpha Cass. | Erigeron L. | | | Trimorpha Cass. | Erigeron L. | Asteraceae |
| Triniteurybia Brouillet et al. | | a | | Triniteurybia Brouillet et al. | | Asteraceae |
| Tripolium Nees | | a | | Tripolium Nees | | Asteraceae |
| Vanclevea Greene | | a | | Vanclevea Greene | | Asteraceae |
| Vernoniopsis Humbert | | a | | Vernoniopsis Humbert | | Asteraceae |
| Virgulaster Semple | Aster L. | | | Virgulaster Semple | Aster L. | Asteraceae |
| Vittadinia A. Rich. | | a | | Vittadinia A. Rich. | | Asteraceae |
| Wardaster Small | Aster L. | | | Wardaster Small | Aster L. | Asteraceae |
| Weberaster Á. Löve & D. Löve | Aster L. | | | Weberaster Á. Löve & D. Löve | Aster L. | Asteraceae |
| Welwitschiella O. Hoffm. | | a | | Welwitschiella O. Hoffm. | | Asteraceae |
| Westoniella Cuatrec. | | a | | Westoniella Cuatrec. | | Asteraceae |
| Xanthisma DC. | | a | | Xanthisma DC. | | Asteraceae |
| Xanthocephalum Willd. | | a | | Xanthocephalum Willd. | | Asteraceae |
| Xylorhiza Nutt. | | a | | Xylorhiza Nutt. | | Asteraceae |
| Xylothamia G. L. Nesom et al. | Gundlachia A. Gray | | | Xylothamia G. L. Nesom et al. | Gundlachia A. Gray | Asteraceae |
| Xylovirgata Urbatsch & R. P. Roberts | | a | | Xylovirgata Urbatsch & R. P. Roberts | | Asteraceae |
| Zyrphelis Cass. | | a | | Zyrphelis Cass. | | Asteraceae |