| Helenium apterum (S. F. Blake) Bierner |
Accepted |
17 |
| Helenium arizonicum S. F. Blake |
Accepted |
15 |
| Helenium aromaticum (Hook.) L. H. Bailey |
Accepted |
17 |
| Helenium atacamense Cabrera |
Accepted |
17 |
| Helenium autumnale L. |
Accepted |
17 |
| Helenium bigelovii A. Gray |
Accepted |
16 |
| Helenium bolanderi A. Gray |
Accepted |
16 |
| Helenium brevifolium (Nutt.) A. Wood |
Accepted |
13 |
| Helenium campestre Small |
Accepted |
14 |
| Helenium drummondii H. Rock |
Accepted |
16 |
| Helenium elegans DC. |
Accepted |
13 |
| Helenium elegans var. amphibolum (A. Gray) Bierner |
Accepted |
13 |
| Helenium flexuosum Raf. |
Accepted |
14 |
| Helenium glaucum (Cav.) Stuntz |
Accepted |
17 |
| Helenium integrifolium Sessé & Moc. |
Accepted |
15 |
| Helenium laciniatum A. Gray |
Accepted |
13 |
| Helenium linifolium Rydb. |
Accepted |
14 |
| Helenium mexicanum Kunth |
Accepted |
13 |
| Helenium microcephalum DC. |
Accepted |
13 |
| Helenium microcephalum var. ooclinium (A. Gray) Bierner |
Accepted |
13 |
| Helenium ovallense Bierner |
Accepted |
17 |
| Helenium pinnatifidum (Schwein.) Rydb. |
Accepted |
16 |
| Helenium puberulum DC. |
Accepted |
29 |
| Helenium quadridentatum Labill. |
Accepted |
13 |
| Helenium radiatum (Less.) Seckt |
Accepted |
34 |
| Helenium scorzoneraefolium (DC.) A. Gray |
Accepted |
17 |
| Helenium tenuifolium Nutt. |
Accepted |
15 |
| Helenium thurberi A. Gray |
Accepted |
13 |
| Helenium urmenetae (Phil.) Cabrera |
Accepted |
17 |
| Helenium vallenariense (Phil.) Bierner |
Accepted |
17 |
| Helenium vernale Walter |
Accepted |
17 |
| Helenium virginicum S. F. Blake |
Accepted |
13 |
| Helenium amarum (Raf.) H. Rock |
Unresolved |
15 |
| Helenium amarum var. badium Waterf. |
Unresolved |
15 |
| Helenium brevifolium A. Gray |
Unresolved |
13 |
| Helenium decurrens (J. F. Macbr.) Moldenke |
Unresolved |
20 |
| Helenium mexicanum A. Gray |
Unresolved |
14 |
| Helenium mexicanum DC. |
Unresolved |
13 |
| Helenium quadridentatum Hook. |
Unresolved |
13 |
| Helenium amarum |
Synonym of Helenium amarum (Raf.) H. Rock |
15 |
| Helenium badium (A. Gray) Greene |
Synonym of Helenium amarum var. badium Waterf. |
15 |
| Helenium autumnale var. montanum (Nutt.) Fernald |
Synonym of Helenium autumnale L. |
17 |
| Helenium curtisii A. Gray |
Synonym of Helenium brevifolium (Nutt.) A. Wood |
13 |
| Helenium donianum (Hook. & Arn.) Cabrera |
Synonym of Helenium donianum (Hook. & Arn.) Seckt |
34 |
| Helenium elegans var. elegans |
Synonym of Helenium elegans DC. |
13 |
| Helenium nudiflorum Nutt. |
Synonym of Helenium flexuosum Raf. |
14 |
| Hymenoxys integrifolia (Kunth) Bierner |
Synonym of Helenium integrifolium (Kunth) Benth. & Hook. ex Hemsl. |
15 |
| Helenium microcephalum var. microcephalum |
Synonym of Helenium microcephalum DC. |
13 |
| Helenium decurrens (Less.) Vatke |
Synonym of Helenium puberulum DC. |
29 |
| Helenium alternifolium (Spreng.) Cabrera |
Synonym of Helenium radiatum (Less.) Seckt |
34 |
| Hecubaea scorzoneraefolia DC. |
Synonym of Helenium scorzoneraefolium (DC.) A. Gray |
17 |
| Helenium urmenetae var. urmenetae |
Synonym of Helenium urmenetae (Phil.) Cabrera |
17 |
| Helenium hoopesii A. Gray |
Synonym of Hymenoxys hoopesii (A. Gray) Bierner |
15 |
