| Machaeranthera arenaria (Benth.) Shinners |
Accepted |
4 |
| Machaeranthera asteroides var. asteroides |
Accepted |
4 |
| Machaeranthera canescens (Pursh) A. Gray |
Accepted |
4 |
| Machaeranthera canescens var. glabra A. Gray |
Accepted |
4 |
| Machaeranthera coulteri (A. Gray) B. L. Turner & D. B. Horne |
Accepted |
5 |
| Machaeranthera crispa (Brandegee) B. L. Turner & D. B. Horne |
Accepted |
5 |
| Machaeranthera crutchfieldii B. L. Turner |
Accepted |
4 |
| Machaeranthera frutescens (S. Watson) Cronquist & D. D. Keck |
Accepted |
6 |
| Machaeranthera gracilis (Nutt.) Shinners |
Accepted |
2 |
| Machaeranthera gymnocephala (DC.) Shinners |
Accepted |
4 |
| Machaeranthera gypsitherma G. L. Nesom & Vorobik & R. L. Hartm. |
Accepted |
5 |
| Machaeranthera gypsophila B. L. Turner |
Accepted |
4 |
| Machaeranthera parviflora A. Gray |
Accepted |
5 |
| Machaeranthera pinnatifida (Hook.) Shinners |
Accepted |
4 |
| Machaeranthera pinnatifida var. goodingii (A. Nelson) B. L. Turner & R. L. Hartm. |
Accepted |
4 |
| Machaeranthera restiformis B. L. Turner |
Accepted |
4 |
| Machaeranthera riparia (Kunth) A. G. Jones |
Accepted |
5 |
| Machaeranthera stenoloba (Greene) Shinners |
Accepted |
4 |
| Machaeranthera tagetina Greene |
Accepted |
4 |
| Machaeranthera tanacetifolia (Kunth) Nees |
Accepted |
4 |
| Machaeranthera tenuis (S. Watson) B. L. Turner & D. B. Horne |
Accepted |
4 |
| Machaeranthera turneri M. L. Arnold & R. C. Jacks. |
Accepted |
5 |
| Machaeranthera ammophila Reveal |
Synonym of Arida arizonica (R. C. Jacks. & R. R. Johnson) D. R. Morgan & R. L. Hartm. |
5 |
| Machaeranthera arida B. L. Turner & D. B. Horne |
Synonym of Arida arizonica (R. C. Jacks. & R. R. Johnson) D. R. Morgan & R. L. Hartm. |
5 |
| Machaeranthera arizonica R. C. Jacks. & R. R. Johnson |
Synonym of Arida arizonica (R. C. Jacks. & R. R. Johnson) D. R. Morgan & R. L. Hartm. |
5 |
| Machaeranthera tephrodes (A. Gray) Greene |
Synonym of Dieteria asteroides var. asteroides |
4 |
| Machaeranthera asteroides var. glandulosa B. L. Turner |
Synonym of Dieteria asteroides var. glandulosa (B. L. Turner) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera aspera Greene |
Synonym of Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera bigelovii (A. Gray) Greene |
Synonym of Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera bigelovii var. bigelovii |
Synonym of Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera rubricaulis Rydb. |
Synonym of Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera bigelovii var. commixta (Greene) B. L. Turner |
Synonym of Dieteria bigelovii var. commixta (Greene) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera commixta Greene |
Synonym of Dieteria bigelovii var. commixta (Greene) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera bigelovii var. mucronata (Greene) B. L. Turner |
Synonym of Dieteria bigelovii var. mucronata (Greene) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera mucronata Greene |
Synonym of Dieteria bigelovii var. mucronata (Greene) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera shastensis var. glossophylla (Piper) Cronquist & D. D. Keck |
Synonym of Dieteria canescens (Pursh) Nutt. |
4 |
| Machaeranthera shastensis var. montana (Greene) Cronquist & D. D. Keck |
Synonym of Dieteria canescens (Pursh) Nutt. |
4 |
| Machaeranthera canescens var. ambigua B. L. Turner |
Synonym of Dieteria canescens var. ambigua (B. L. Turner) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera canescens var. aristata (Eastw.) B. L. Turner |
Synonym of Dieteria canescens var. aristata (Eastw.) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera linearis Greene |
Synonym of Dieteria canescens var. glabra (A. Gray) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera canescens var. incana (Lindl.) A. Gray |
Synonym of Dieteria canescens var. incana (Lindl.) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera canescens var. leucanthemifolia (Greene) S. L. Welsh |
Synonym of Dieteria canescens var. leucanthemifolia (Greene) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera leucanthemifolia (Greene) Greene |
Synonym of Dieteria canescens var. leucanthemifolia (Greene) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera canescens var. nebraskana B. L. Turner |
Synonym of Dieteria canescens var. nebraskana (B. L. Turner) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera canescens var. shastensis (A. Gray) B. L. Turner |
Synonym of Dieteria canescens var. shastensis (A. Gray) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera scabrella (Greene) Shinners |
Synonym of Ericameria nauseosa var. ammophila L. C. Anderson |
4 |
| Haplopappus arenarius Benth. |
Synonym of Machaeranthera arenaria (Benth.) Shinners |
4 |
| Xanthisma arenarium (Benth.) D. R. Morgan & R. L. Hartm. |
Synonym of Machaeranthera arenaria (Benth.) Shinners |
4 |
| Dieteria asteroides Torr. |
Synonym of Machaeranthera asteroides (Torr.) Greene |
4 |
| Machaeranthera canescens var. latifolia A. Gray |
Synonym of Machaeranthera asteroides (Torr.) Greene |
4 |
| Machaeranthera canescens var. canescens |
Synonym of Machaeranthera canescens (Pursh) A. Gray |
4 |
| Xylorhiza crutchfieldii (B. L. Turner) D. R. Morgan & R. L. Hartm. |
Synonym of Machaeranthera crutchfieldii B. L. Turner |
4 |
| Machaeranthera gymnocephala Gray |
Synonym of Machaeranthera gymnocephala (DC.) Shinners |
4 |
| Machaeranthera pinnatifida var. pinnatifida |
Synonym of Machaeranthera pinnatifida (Hook.) Shinners |
4 |
| Xanthisma restiforme (B. L. Turner) D. R. Morgan & R. L. Hartm. |
Synonym of Machaeranthera restiformis B. L. Turner |
4 |
| Xanthisma stenolobum (Greene) D. R. Morgan & R. L. Hartm. |
Synonym of Machaeranthera stenoloba (Greene) Shinners |
4 |
| Machaeranthera tanacetifolia (HBK) Nees |
Synonym of Machaeranthera tanacetifolia (Kunth) Nees |
4 |
| Psilactis tenuis S. Watson |
Synonym of Machaeranthera tenuis (S. Watson) B. L. Turner & D. B. Horne |
4 |
| Haplopappus wigginsii S. F. Blake |
Synonym of Machaeranthera wigginsii (S. F. Blake) R. L. Hartm. |
4 |
| Xanthisma wigginsii (S. F. Blake) D. R. Morgan & R. L. Hartm. |
Synonym of Machaeranthera wigginsii (S. F. Blake) R. L. Hartm. |
4 |
| Machaeranthera boltoniae (Greene) B. L. Turner & D. B. Horne |
Synonym of Psilactis asteroides A. Gray |
4 |
| Machaeranthera brevilingulata (S. Bip.) B. L. Turner & D. B. Horne |
Synonym of Psilactis brevilingulata S. Bip. ex Hemsl. |
9 |
| Machaeranthera heterocarpa R. L. Hartm. & M. A. Lane |
Synonym of Psilactis heterocarpa (R. L. Hartm. & M. A. Lane) D. R. Morgan |
3 |
| Machaeranthera odysseus G. L. Nesom |
Synonym of Psilactis odysseus (G. L. Nesom) D. R. Morgan |
9 |
| Machaeranthera blephariphylla (A. Gray) Shinners |
Synonym of Xanthisma blephariphyllum (A. Gray) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera coloradoensis (A. Gray) Osterh. |
Synonym of Xanthisma coloradoense (A. Gray) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera grindelioides (Nutt.) Shinners |
Synonym of Xanthisma grindelioides (Nutt.) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera australis (Greene) Shinners |
Synonym of Xanthisma spinulosum (Pursh) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera pinnatifida subsp. gooddingii (A. Nelson) B. L. Turner & R. L. Hartm. |
Synonym of Xanthisma spinulosum var. gooddingii (A. Nelson) D. R. Morgan & R. L. Hartm. |
4 |
| Machaeranthera tortifolia (Torr. & A. Gray) Cronquist & D. D. Keck |
Synonym of Xylorhiza tortifolia (Torr. & A. Gray) Greene |
6 |
| Machaeranthera wrightii (A. Gray) Cronquist & D. D. Keck |
Synonym of Xylorhiza wrightii (A. Gray) Greene |
6 |