| Calylophus serrulatus (Nutt.) P. H. Raven | Oenothera serrulata Nutt. | | | Calylophus serrulatus (Nutt.) P. H. Raven | Oenothera serrulata Nutt. | 100613 | 25537 |
| Calylophus tubicula (A. Gray) P. H. Raven | Oenothera tubicula A. Gray subsp. tubicula | | | Calylophus tubicula (A. Gray) P. H. Raven | Oenothera tubicula A. Gray subsp. tubicula | 450892 | 458553 |
| Calylophus hartwegii (Benth.) P. H. Raven | Oenothera hartwegii Benth. subsp. hartwegii | | | Calylophus hartwegii (Benth.) P. H. Raven | Oenothera hartwegii Benth. subsp. hartwegii | 457209 | 458537 |
| Calylophus hartwegii (Benth.) P. H. Raven subsp. pubescens (A. Gray) Towner & P. H. Raven | Oenothera hartwegii Benth. subsp. pubescens (A. Gray) W. L. Wagner & Hoch | | i | Calylophus hartwegii (Benth.) P. H. Raven subsp. pubescens (A. Gray) Towner & P. H. Raven | Oenothera hartwegii Benth. subsp. pubescens (A. Gray) W. L. Wagner & Hoch | 458543 | 458541 |
| Calylophus hartwegii (Benth.) P. H. Raven subsp. fendleri (A. Gray) Towner & P. H. Raven | Oenothera hartwegii Benth. subsp. fendleri (A. Gray) W. L. Wagner & Hoch | | i | Calylophus hartwegii (Benth.) P. H. Raven subsp. fendleri (A. Gray) Towner & P. H. Raven | Oenothera hartwegii Benth. subsp. fendleri (A. Gray) W. L. Wagner & Hoch | 458546 | 458538 |
| Calylophus hartwegii (Benth.) P. H. Raven subsp. filifolius (Eastw.) Towner & P. H. Raven | Oenothera hartwegii Benth. subsp. filifolia (Eastw.) W. L. Wagner & Hoch | | i | Calylophus hartwegii (Benth.) P. H. Raven subsp. filifolius (Eastw.) Towner & P. H. Raven | Oenothera hartwegii Benth. subsp. filifolia (Eastw.) W. L. Wagner & Hoch | 458549 | 458539 |
| Calylophus hartwegii (Benth.) P. H. Raven var. maccartii Shinners | Oenothera hartwegii Benth. subsp. maccartii (Shinners) W. L. Wagner & Hoch | | i | Calylophus hartwegii (Benth.) P. H. Raven var.maccartii Shinners | Oenothera hartwegii Benth. subsp. maccartii (Shinners) W. L. Wagner & Hoch | 458550 | 458540 |
| Calylophus hartwegii (Benth.) P. H. Raven subsp. maccartii (Shinners) Towner & P. H. Raven | Oenothera hartwegii Benth. subsp. maccartii (Shinners) W. L. Wagner & Hoch | | i | Calylophus hartwegii (Benth.) P. H. Raven subsp. maccartii (Shinners) Towner & P. H. Raven | Oenothera hartwegii Benth. subsp. maccartii (Shinners) W. L. Wagner & Hoch | 458551 | 458540 |
| Calylophus tubicula (A. Gray) P. H. Raven subsp. strigulosus Towner | Oenothera tubicula A. Gray subsp. strigulosa (Towner) W. L. Wagner & Hoch | | i | Calylophus tubicula (A. Gray) P. H. Raven subsp. strigulosus Towner | Oenothera tubicula A. Gray subsp. strigulosa (Towner) W. L. Wagner & Hoch | 458555 | 458554 |
| Calylophus lavandulifolius (Torr. & A. Gray) P. H. Raven | Oenothera lavandulifolia Torr. & A. Gray | | | Calylophus lavandulifolius (Torr. & A. Gray) P. H. Raven | Oenothera lavandulifolia Torr. & A. Gray | 460359 | 460358 |
| Calylophus berlandieri Spach | Oenothera berlandieri (Spach) Steud. | | | Calylophus berlandieri Spach | Oenothera berlandieri (Spach) Steud. | 463824 | 463823 |
| Calylophus drummondianus Spach subsp. berlandieri (Spach) Towner & P. H. Raven | Oenothera berlandieri (Spach) Steud. | | i | Calylophus drummondianus Spach subsp. berlandieri (Spach) Towner & P. H. Raven | Oenothera berlandieri (Spach) Steud. | 463826 | 463823 |
| Calylophus hartwegii (Benth.) P. H. Raven var. hartwegii | Oenothera hartwegii Benth. subsp. hartwegii | | i | Calylophus hartwegii (Benth.) P. H. Raven var.hartwegii | Oenothera hartwegii Benth. subsp. hartwegii | 486418 | 458537 |
| Calylophus hartwegii (Benth.) P. H. Raven subsp. hartwegii | Oenothera hartwegii Benth. subsp. hartwegii | | i | Calylophus hartwegii (Benth.) P. H. Raven subsp. hartwegii | Oenothera hartwegii Benth. subsp. hartwegii | 486419 | 458537 |
| Calylophus tubicula (A. Gray) P. H. Raven subsp. tubicula | Oenothera tubicula A. Gray subsp. tubicula | | i | Calylophus tubicula (A. Gray) P. H. Raven subsp. tubicula | Oenothera tubicula A. Gray subsp. tubicula | 486420 | 458553 |