| Hymenostephium guatemalense (B.L. Rob. & Greenm.) S.F. Blake, 1918 |
| Hymenostephium hintonii (H. Rob.) E.E. Schill. & Panero, 2002 |
| Hymenostephium kingii (McVaugh) E.E. Schill. & Panero, 2002 |
| Hymenostephium mexicanum Benth., 1876 |
| Hymenostephium microcephalum (Less.) S.F. Blake, 1918 |
| Hymenostephium pilosulum S.F. Blake, 1915 |
| Hymenostephium rivularis (Poepp.) E.E. Schill. & Panero, 2002 |
| Hymenostephium superaxillare S.F. Blake, 1924 |
| Hymenostephium tenue (A. Gray) E.E. Schill. & Panero, 2002 |
| Hymenostephium uniseriatum E.E. Schill. & Panero, 2002 |
| Hymenostephium websteri (B.L. Turner) E.E. Schill. & Panero, 2002 |
| Hymenostephium woronowii (S.F. Blake) E.E. Schill. & Panero, 2002 |
| Hymenothrix A. Gray, 1849 |
| Hymenothrix autumnalis (W.L. Ellison) B.G. Baldwin, 2016 |
| Hymenothrix biternata (A. Gray) B.G. Baldwin, 2016 |
| Hymenothrix dissecta (A. Gray) B.G. Baldwin, 2016 |
| Hymenothrix glandulopubescens (Waterf.) B.G. Baldwin, 2016 |
| Hymenothrix greenmanii (Heiser) B.L. Turner, 1962 |
| Hymenothrix janakosiana (B.L. Turner) B.G. Baldwin, 2016 |
| Hymenothrix palmeri A. Gray, 1886 |