| Hymenoxys ambigens var. floribunda (A. Gray) W. L. Wagner |
Accepted |
15 |
| Hymenoxys anthemoides (Juss.) Cass. ex DC. |
Accepted |
15 |
| Hymenoxys bigelovii (A. Gray) K. F. Parker |
Accepted |
15 |
| Hymenoxys brandegeei (Porter) Porter ex K. F. Parker |
Accepted |
15 |
| Hymenoxys cabrerae K. L. Parker |
Accepted |
15 |
| Hymenoxys californica Hook. |
Accepted |
10 |
| Hymenoxys chrysanthemoides (Kunth) DC. |
Accepted |
15 |
| Hymenoxys cooperi (A. Gray) Cockerell |
Accepted |
15 |
| Hymenoxys grandiflora (Torr. & A. Gray) K. F. Parker |
Accepted |
15 |
| Hymenoxys helenioides (Rydb.) Cockerell |
Accepted |
15 |
| Hymenoxys hoopesii (A. Gray) Bierner |
Accepted |
15 |
| Hymenoxys insignis (A. Gray) Cockerell |
Accepted |
15 |
| Hymenoxys jamesii Bierner |
Accepted |
15 |
| Hymenoxys lemmonii (Greene) Cockerell |
Accepted |
15 |
| Hymenoxys odorata DC. |
Accepted |
14 |
| Hymenoxys quinquesquamata Rydb. |
Accepted |
15 |
| Hymenoxys richardsonii (Hook.) Cockerell |
Accepted |
15 |
| Hymenoxys richardsonii var. floribunda (A. Gray) K. F. Parker |
Accepted |
15 |
| Hymenoxys robusta (Rusby) K. F. Parker |
Accepted |
15 |
| Hymenoxys rusbyi (A. Gray) Cockerell |
Accepted |
15 |
| Hymenoxys subintegra Cockerell |
Accepted |
15 |
| Hymenoxys texana (J. M. Coult. & Rose) Cockerell |
Accepted |
3 |
| Hymenoxys tweediei Hook. & Arn. |
Accepted |
15 |
| Hymenoxys vaseyi (A. Gray) Cockerell |
Accepted |
15 |
| Hymenoxys arizonica (Pursh) K. F. Parker |
Unresolved |
15 |
| Hymenoxys integrifolia Kunth |
Unresolved |
15 |
| Hymenoxys pinetorum (Standl.) Bierner |
Synonym of Dugaldia pinetorum (Standl.) Bierner |
15 |
| Hymenoxys integrifolia (Kunth) Bierner |
Synonym of Helenium integrifolium (Kunth) Benth. & Hook. ex Hemsl. |
15 |
| Hymenoxys ambigens var. ambigens |
Synonym of Hymenoxys ambigens (S. F. Blake) Bierner |
15 |
| Plummera ambigens S. F. Blake |
Synonym of Hymenoxys ambigens (S. F. Blake) Bierner |
15 |
| Plummera floribunda A. Gray |
Synonym of Hymenoxys ambigens var. floribunda (A. Gray) W. L. Wagner |
15 |
| Hymenoxys anthemoides (Juss) Cass. |
Synonym of Hymenoxys anthemoides (Juss.) Cass. ex DC. |
15 |
| Hymenoxys anthemoides None |
Synonym of Hymenoxys anthemoides (Juss.) Cass. ex DC. |
15 |
| Hymenoxys cooperi var. canescens (D. C. Eaton) K. F. Parker |
Synonym of Hymenoxys cooperi (A. Gray) Cockerell |
15 |
| Hymenoxys helenioides (Rydb.) Ckll. |
Synonym of Hymenoxys helenioides (Rydb.) Cockerell |
15 |
| Dugaldia hoopesii (A. Gray) Rydb. |
Synonym of Hymenoxys hoopesii (A. Gray) Bierner |
15 |
| Helenium hoopesii A. Gray |
Synonym of Hymenoxys hoopesii (A. Gray) Bierner |
15 |
| Hymenoxys richardsonii subsp. richardsonii |
Synonym of Hymenoxys richardsonii (Hook.) Cockerell |
15 |
| Hymenoxys richardsonii var. richardsonii |
Synonym of Hymenoxys richardsonii (Hook.) Cockerell |
15 |
| Hymenoxys acaulis (Pursh) K. F. Parker |
Synonym of Tetraneuris acaulis (Pursh) Greene |
15 |
| Hymenoxys acaulis (Pursh) K. F. Parker |
Synonym of Tetraneuris acaulis (Pursh) Greene |
15 |
| Hymenoxys acaulis var. acaulis |
Synonym of Tetraneuris acaulis (Pursh) Greene |
15 |
| Hymenoxys acaulis var. arizonica (Greene) K. F. Parker |
Synonym of Tetraneuris acaulis var. arizonica (Greene) K. F. Parker |
15 |
| Hymenoxys acaulis var. caespitosa (A. Nelson) K. F. Parker |
Synonym of Tetraneuris acaulis var. caespitosa A. Nelson |
14 |
| Hymenoxys argentea (A. Gray) K. F. Parker |
Synonym of Tetraneuris argentea (A. Gray) Greene |
15 |
| Hymenoxys acaulis var. ivesiana (Greene) K. F. Parker |
Synonym of Tetraneuris ivesiana Greene |
15 |
| Hymenoxys ivesiana (Greene) K. F. Parker |
Synonym of Tetraneuris ivesiana Greene |
15 |
| Hymenoxys linearifolia Hook. |
Synonym of Tetraneuris linearifolia (Hook.) Greene |
15 |
| Hymenoxys scaposa (DC.) K. F. Parker |
Synonym of Tetraneuris scaposa (DC.) Greene |
30 |
| Hymenoxys scaposa var. linearis (Nutt.) K. F. Parker |
Synonym of Tetraneuris scaposa (DC.) Greene |
30 |
| Hymenoxys turneri K. F. Parker |
Synonym of Tetraneuris turneri (K. F. Parker) K. F. Parker |
45 |