| Oenothera affinis Cambess. | | a | | Oenothera affinis Cambess. | | 25519 | |
| Oenothera berteroana Spach | Oenothera affinis Cambess. | | | Oenothera berteroana Spach | Oenothera affinis Cambess. | 25520 | 25519 |
| Oenothera biennis L. | | a | | Oenothera biennis L. | | 25521 | |
| Oenothera campylocalyx K. Koch & C. D. Bouché | Oenothera versicolor Lehm. | | | Oenothera campylocalyx K. Koch & C. D. Bouché | Oenothera versicolor Lehm. | 25522 | 100637 |
| Oenothera claviformis Torr. & Frém. | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. claviformis | | | Oenothera claviformis Torr. & Frém. | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. claviformis | 25523 | 458580 |
| Oenothera contorta Douglas | Camissonia contorta (Douglas) Kearney | | | Oenothera contorta Douglas | Camissonia contorta (Douglas) Kearney | 25524 | 100612 |
| Oenothera coquimbensis Gay | | a | | Oenothera coquimbensis Gay | | 25525 | |
| Oenothera drummondii Hook. | | a | | Oenothera drummondii Hook. | | 25526 | |
| Oenothera fruticosa L. subsp. fruticosa | | a | i | Oenothera fruticosa L. subsp. fruticosa | | 25527 | |
| Oenothera glauca Michx. | Oenothera fruticosa L. subsp. glauca (Michx.) Straley | | | Oenothera glauca Michx. | Oenothera fruticosa L. subsp. glauca (Michx.) Straley | 25528 | 100631 |
| Oenothera hookeri Torr. & A. Gray | Oenothera elata Kunth subsp. hookeri (Torr. & A. Gray) W. Dietr. & W. L. Wagner | | | Oenothera hookeri Torr. & A. Gray | Oenothera elata Kunth subsp. hookeri (Torr. & A. Gray) W. Dietr. & W. L. Wagner | 25529 | 317167 |
| Oenothera laciniata Hill var. limensis Munz & I. M. Johnst. | Oenothera arequipensis Munz & I. M. Johnst. | | i | Oenothera laciniata Hill var.limensis Munz & I. M. Johnst. | Oenothera arequipensis Munz & I. M. Johnst. | 25530 | 100636 |
| Oenothera lamarckiana Ser. | Oenothera grandiflora LʼHér. | | | Oenothera lamarckiana Ser. | Oenothera grandiflora LʼHér. | 25531 | 100528 |
| Oenothera missourensis Sims | Oenothera macrocarpa Nutt. | | | Oenothera missourensis Sims | Oenothera macrocarpa Nutt. | 25532 | 100623 |
| Oenothera mollissima L. | | a | | Oenothera mollissima L. | | 25533 | |
| Oenothera odorata Jacq. | | a | | Oenothera odorata Jacq. | | 25534 | |
| Oenothera pumila L. | Oenothera perennis L. | | | Oenothera pumila L. | Oenothera perennis L. | 25535 | 100616 |
| Oenothera rosea LʼHér. ex Aiton | | a | | Oenothera rosea LʼHér. ex Aiton | | 25536 | |
| Oenothera serrulata Nutt. | | a | | Oenothera serrulata Nutt. | | 25537 | |
| Oenothera striata Link | Oenothera stricta Ledeb. ex Link subsp. stricta | | | Oenothera striata Link | Oenothera stricta Ledeb. ex Link subsp. stricta | 25538 | 100542 |
| Oenothera tetraptera Cav. | | a | | Oenothera tetraptera Cav. | | 25539 | |
| Oenothera speciosa Nutt. | | a | | Oenothera speciosa Nutt. | | 70465 | |
| Oenothera argillicola Mack. | | a | | Oenothera argillicola Mack. | | 100523 | |
| Oenothera erythrosepala (Borbás) Borbás | Oenothera glazioviana Micheli | | | Oenothera erythrosepala (Borbás) Borbás | Oenothera glazioviana Micheli | 100524 | 100525 |
| Oenothera glazioviana Micheli | | a | | Oenothera glazioviana Micheli | | 100525 | |
| Oenothera laciniata Hill subsp. laciniata | Oenothera laciniata Hill | | i | Oenothera laciniata Hill subsp. laciniata | Oenothera laciniata Hill | 100526 | 300403 |
| Oenothera humifusa Nutt. | | a | | Oenothera humifusa Nutt. | | 100527 | |
| Oenothera grandiflora LʼHér. | | a | | Oenothera grandiflora LʼHér. | | 100528 | |
| Oenothera hookeri Torr. & A. Gray subsp. hewettii Cockerell | Oenothera elata Kunth subsp. hirsutissima (A. Gray ex S. Watson) W. Dietr. | | i | Oenothera hookeri Torr. & A. Gray subsp. hewettii Cockerell | Oenothera elata Kunth subsp. hirsutissima (A. Gray ex S. Watson) W. Dietr. | 100529 | 317169 |
| Oenothera hookeri Torr. & A. Gray subsp. hirsutissima (A. Gray ex S. Watson) Munz | Oenothera elata Kunth subsp. hirsutissima (A. Gray ex S. Watson) W. Dietr. | | i | Oenothera hookeri Torr. & A. Gray subsp. hirsutissima (A. Gray ex S. Watson) Munz | Oenothera elata Kunth subsp. hirsutissima (A. Gray ex S. Watson) W. Dietr. | 100530 | 317169 |
| Oenothera hookeri Torr. & A. Gray subsp. montereyensis Munz | Oenothera elata Kunth subsp. hookeri (Torr. & A. Gray) W. Dietr. & W. L. Wagner | | i | Oenothera hookeri Torr. & A. Gray subsp. montereyensis Munz | Oenothera elata Kunth subsp. hookeri (Torr. & A. Gray) W. Dietr. & W. L. Wagner | 100531 | 317167 |
| Oenothera hookeri Torr. & A. Gray subsp. venusta (Bartlett) Munz | Oenothera elata Kunth subsp. hirsutissima (A. Gray ex S. Watson) W. Dietr. | | i | Oenothera hookeri Torr. & A. Gray subsp. venusta (Bartlett) Munz | Oenothera elata Kunth subsp. hirsutissima (A. Gray ex S. Watson) W. Dietr. | 100532 | 317169 |
| Oenothera grandis Smyth | | a | | Oenothera grandis Smyth | | 100533 | |
| Oenothera jamesii Torr. & A. Gray | | a | | Oenothera jamesii Torr. & A. Gray | | 100534 | |
| Oenothera heterophylla Spach | | a | | Oenothera heterophylla Spach | | 100535 | |
| Oenothera oakesiana (A. Gray) J. W. Robbins ex S. Watson | | a | | Oenothera oakesiana (A. Gray) J. W. Robbins ex S. Watson | | 100536 | |
| Oenothera parviflora L. | | a | | Oenothera parviflora L. | | 100537 | |
| Oenothera rhombipetala Nutt. ex Torr. & A. Gray | | a | | Oenothera rhombipetala Nutt. ex Torr. & A. Gray | | 100538 | |
| Oenothera parviflora L. subsp. angustissima (R. R. Gates) Munz | Oenothera parviflora L. | | i | Oenothera parviflora L. subsp. angustissima (R. R. Gates) Munz | Oenothera parviflora L. | 100539 | 100537 |
| Oenothera longissima Rydb. | | a | | Oenothera longissima Rydb. | | 100540 | |
| Oenothera strigosa (Rydb.) Mack. & Bush | Oenothera villosa Thunb. subsp. strigosa (Rydb.) W. Dietr. & P. H. Raven | | | Oenothera strigosa (Rydb.) Mack. & Bush | Oenothera villosa Thunb. subsp. strigosa (Rydb.) W. Dietr. & P. H. Raven | 100541 | 410140 |
| Oenothera stricta Ledeb. ex Link subsp. stricta | | a | i | Oenothera stricta Ledeb. ex Link subsp. stricta | | 100542 | |
| Oenothera strigosa (Rydb.) Mack. & Bush subsp. canovirens (E. Steele) Munz | Oenothera villosa Thunb. subsp. villosa | | i | Oenothera strigosa (Rydb.) Mack. & Bush subsp. canovirens (E. Steele) Munz | Oenothera villosa Thunb. subsp. villosa | 100544 | 100626 |
| Oenothera perennis L. | | a | | Oenothera perennis L. | | 100616 | |
| Oenothera curtissii Small | | a | | Oenothera curtissii Small | | 100617 | |
| Oenothera bifrons D. Don | Oenothera heterophylla Spach | | | Oenothera bifrons D. Don | Oenothera heterophylla Spach | 100618 | 100535 |
| Oenothera pubescens Willd. ex Spreng. | | a | | Oenothera pubescens Willd. ex Spreng. | | 100619 | |
| Oenothera mexicana Spach | | a | | Oenothera mexicana Spach | | 100620 | |
| Oenothera elata Kunth | | a | | Oenothera elata Kunth | | 100621 | |
| Oenothera strigosa (Rydb.) Mack. & Bush subsp. cheradophila (Bartlett) Munz | Oenothera villosa Thunb. subsp. strigosa (Rydb.) W. Dietr. & P. H. Raven | | i | Oenothera strigosa (Rydb.) Mack. & Bush subsp. cheradophila (Bartlett) Munz | Oenothera villosa Thunb. subsp. strigosa (Rydb.) W. Dietr. & P. H. Raven | 100622 | 410140 |
| Oenothera macrocarpa Nutt. | | a | | Oenothera macrocarpa Nutt. | | 100623 | |
| Oenothera parodiana Munz subsp. parodiana | Oenothera parodiana Munz | | i | Oenothera parodiana Munz subsp. parodiana | Oenothera parodiana Munz | 100625 | 316765 |
| Oenothera villosa Thunb. subsp. villosa | | a | i | Oenothera villosa Thunb. subsp. villosa | | 100626 | |
| Oenothera suaveolens Pers. | Oenothera biennis L. | | | Oenothera suaveolens Pers. | Oenothera biennis L. | 100628 | 25521 |
| Oenothera chicagoensis Renner ex R. E. Cleland & Blakeslee, nom. nud. | Oenothera biennis L. | | | Oenothera chicagoensis Renner ex R. E. Cleland & Blakeslee, nom. nud. | Oenothera biennis L. | 100629 | 25521 |
| Oenothera austromontana (Munz) P. H. Raven et al. | Oenothera nutans G. F. Atk. & Bartlett | | | Oenothera austromontana (Munz) P. H. Raven et al. | Oenothera nutans G. F. Atk. & Bartlett | 100630 | 410136 |
| Oenothera fruticosa L. subsp. glauca (Michx.) Straley | | a | i | Oenothera fruticosa L. subsp. glauca (Michx.) Straley | | 100631 | |
| Oenothera laciniata Hill subsp. pubescens (Willd. ex Spreng.) Munz | Oenothera pubescens Willd. ex Spreng. | | i | Oenothera laciniata Hill subsp. pubescens (Willd. ex Spreng.) Munz | Oenothera pubescens Willd. ex Spreng. | 100632 | 100619 |
| Oenothera peruana W. Dietr. | | a | | Oenothera peruana W. Dietr. | | 100635 | |
| Oenothera arequipensis Munz & I. M. Johnst. | | a | | Oenothera arequipensis Munz & I. M. Johnst. | | 100636 | |
| Oenothera versicolor Lehm. | | a | | Oenothera versicolor Lehm. | | 100637 | |
| Oenothera santarii W. Dietr. | | a | | Oenothera santarii W. Dietr. | | 100638 | |
| Oenothera acuticarpa W. Dietr. | Oenothera siambonensis W. Dietr. | | | Oenothera acuticarpa W. Dietr. | Oenothera siambonensis W. Dietr. | 100640 | 458611 |
| Oenothera bahia-blancae W. Dietr. | | a | | Oenothera bahia-blancae W. Dietr. | | 100641 | |
| Oenothera longituba W. Dietr. | | a | | Oenothera longituba W. Dietr. | | 100642 | |
| Oenothera montevidensis W. Dietr. | | a | | Oenothera montevidensis W. Dietr. | | 100643 | |
| Oenothera pedunculifolia W. Dietr. | | a | | Oenothera pedunculifolia W. Dietr. | | 100644 | |
| Oenothera pseudoelongata W. Dietr. | Oenothera elongata Rusby | | | Oenothera pseudoelongata W. Dietr. | Oenothera elongata Rusby | 100645 | 458612 |
| Oenothera pseudolongiflora W. Dietr. | Oenothera parodiana Munz | | | Oenothera pseudolongiflora W. Dietr. | Oenothera parodiana Munz | 100646 | 316765 |
| Oenothera ravenii W. Dietr. subsp. ravenii | | a | i | Oenothera ravenii W. Dietr. subsp. ravenii | | 100647 | |
| Oenothera recurva W. Dietr. | Oenothera tarijensis W. Dietr. | | | Oenothera recurva W. Dietr. | Oenothera tarijensis W. Dietr. | 100648 | 100651 |
| Oenothera tafiensis W. Dietr. subsp. tafiensis W. Dietr. | | a | i | Oenothera tafiensis W. Dietr. subsp. tafiensis W. Dietr. | | 100650 | |
| Oenothera tarijensis W. Dietr. | | a | | Oenothera tarijensis W. Dietr. | | 100651 | |
| Oenothera tucumanensis W. Dietr. | Oenothera siambonensis W. Dietr. | | | Oenothera tucumanensis W. Dietr. | Oenothera siambonensis W. Dietr. | 100653 | 458611 |
| Oenothera villaricae W. Dietr. | | a | | Oenothera villaricae W. Dietr. | | 100655 | |
| Oenothera indecora Cambess. subsp. bonariensis W. Dietr. | Oenothera indecora Cambess. | | i | Oenothera indecora Cambess. subsp. bonariensis W. Dietr. | Oenothera indecora Cambess. | 100656 | 458613 |
| Oenothera parodiana Munz subsp. brasiliensis W. Dietr. | Oenothera parodiana Munz | | i | Oenothera parodiana Munz subsp. brasiliensis W. Dietr. | Oenothera parodiana Munz | 100657 | 316765 |
| Oenothera picensis Phil. subsp. bonariensis W. Dietr. | | a | i | Oenothera picensis Phil. subsp. bonariensis W. Dietr. | | 100658 | |
| Oenothera picensis Phil. subsp. cordobensis W. Dietr. | | a | i | Oenothera picensis Phil. subsp. cordobensis W. Dietr. | | 100660 | |
| Oenothera ravenii W. Dietr. subsp. argentinae W. Dietr. | Oenothera parodiana Munz | | i | Oenothera ravenii W. Dietr. subsp. argentinae W. Dietr. | Oenothera parodiana Munz | 100661 | 316765 |
| Oenothera ravenii W. Dietr. subsp. chilensis W. Dietr. | | a | i | Oenothera ravenii W. Dietr. subsp. chilensis W. Dietr. | | 100662 | |
| Oenothera stricta Ledeb. ex Link subsp. altissima W. Dietr. | | a | i | Oenothera stricta Ledeb. ex Link subsp. altissima W. Dietr. | | 100663 | |
| Oenothera stricta Ledeb. ex Link subsp. argentinae W. Dietr. | Oenothera parodiana Munz | | i | Oenothera stricta Ledeb. ex Link subsp. argentinae W. Dietr. | Oenothera parodiana Munz | 100664 | 316765 |
| Oenothera tafiensis W. Dietr. subsp. parviflora W. Dietr. | | a | i | Oenothera tafiensis W. Dietr. subsp. parviflora W. Dietr. | | 100665 | |
| Oenothera catharinensis Cambess. | | a | | Oenothera catharinensis Cambess. | | 100666 | |
| Oenothera featherstonei Munz & I. M. Johnst. | | a | | Oenothera featherstonei Munz & I. M. Johnst. | | 100667 | |
| Oenothera mendocinensis Gillies ex Hook. & Arn. | | a | | Oenothera mendocinensis Gillies ex Hook. & Arn. | | 100669 | |
| Oenothera nana Griseb. | | a | | Oenothera nana Griseb. | | 100670 | |
| Oenothera picensis Phil. subsp. picensis | | a | i | Oenothera picensis Phil. subsp. picensis | | 100671 | |
| Oenothera punae Kuntze | | a | | Oenothera punae Kuntze | | 100688 | |
| Oenothera rubida Rusby | Oenothera sandiana Hassk. | | | Oenothera rubida Rusby | Oenothera sandiana Hassk. | 100689 | 100690 |
| Oenothera sandiana Hassk. | | a | | Oenothera sandiana Hassk. | | 100690 | |
| Oenothera scabra K. Krause | | a | | Oenothera scabra K. Krause | | 100691 | |
| Oenothera rubricaulis Kleb. | Oenothera biennis L. | | | Oenothera rubricaulis Kleb. | Oenothera biennis L. | 100704 | 25521 |
| Oenothera purpurata Kleb. | Oenothera biennis L. | | | Oenothera purpurata Kleb. | Oenothera biennis L. | 100709 | 25521 |
| Oenothera nuda Renner ex Rostanski, nom. inval. | | a | | Oenothera nuda Renner ex Rostanski, nom. inval. | | 100710 | |
| Oenothera ×hoelscheri Renner ex Rostanski, nom. inval. | | a | | Oenothera hoelscheri Renner ex Rostanski, nom. inval. | | 100711 | |
| Oenothera heterophylla Spach subsp. orientalis W. Dietr. et al. | | a | i | Oenothera heterophylla Spach subsp. orientalis W. Dietr. et al. | | 105112 | |
| Oenothera biennis L. var. sulfurea Kleb., nom. nud. | Oenothera biennis L. | | i | Oenothera biennis L. var.sulfurea Kleb., nom. nud. | Oenothera biennis L. | 105113 | 25521 |
| Oenothera laciniata Hill subsp. floridana | Oenothera laciniata Hill | | i | Oenothera laciniata Hill subsp. floridana | Oenothera laciniata Hill | 105114 | 300403 |
| Oenothera laciniata Hill subsp. texensis | Oenothera laciniata Hill | | i | Oenothera laciniata Hill subsp. texensis | Oenothera laciniata Hill | 105115 | 300403 |
| Oenothera drummondii Hook. subsp. drummondii | | a | i | Oenothera drummondii Hook. subsp. drummondii | | 300400 | |
| Oenothera heterophylla Spach subsp. heterophylla | | a | i | Oenothera heterophylla Spach subsp. heterophylla | | 300401 | |
| Oenothera laciniata Hill | | a | | Oenothera laciniata Hill | | 300403 | |
| Oenothera spp. | | a | | Oenothera spp. | | 300406 | |
| Oenothera villosa Thunb. | | a | | Oenothera villosa Thunb. | | 300407 | |
| Oenothera hybr. | | a | | Oenothera hybr. | | 301097 | |
| Oenothera syrticola Bartlett, nom. nud. | Oenothera oakesiana (A. Gray) J. W. Robbins ex S. Watson | | | Oenothera syrticola Bartlett, nom. nud. | Oenothera oakesiana (A. Gray) J. W. Robbins ex S. Watson | 310102 | 100536 |
| Oenothera littoralis Schltdl. | Oenothera drummondii Hook. subsp. drummondii | | | Oenothera littoralis Schltdl. | Oenothera drummondii Hook. subsp. drummondii | 310103 | 300400 |
| Oenothera lipsiensis Rostanski & Gutte | Oenothera parviflora L. | | | Oenothera lipsiensis Rostanski & Gutte | Oenothera parviflora L. | 310104 | 100537 |
| Oenothera gigas de Vries | Oenothera glazioviana Micheli | | | Oenothera gigas de Vries | Oenothera glazioviana Micheli | 310105 | 100525 |
| Oenothera atrovirens Shull & Bartlett | Oenothera parviflora L. | | | Oenothera atrovirens Shull & Bartlett | Oenothera parviflora L. | 310106 | 100537 |
| Oenothera cruciata Nutt. ex G. Don | Oenothera parviflora L. | | | Oenothera cruciata Nutt. ex G. Don | Oenothera parviflora L. | 310107 | 100537 |
| Oenothera elegans H. Lév. | Clarkia unguiculata Lindl. | | | Oenothera elegans H. Lév. | Clarkia unguiculata Lindl. | 310109 | 310108 |
| Oenothera acutifolia Rostanski, nom. inval. | Oenothera biennis L. | | | Oenothera acutifolia Rostanski, nom. inval. | Oenothera biennis L. | 310110 | 25521 |
| Oenothera blandina de Vries | Oenothera glazioviana Micheli | | | Oenothera blandina de Vries | Oenothera glazioviana Micheli | 310111 | 100525 |
| Oenothera spectabilis hort. ex Spach | Oenothera elata Kunth subsp. elata | | | Oenothera spectabilis hort. ex Spach | Oenothera elata Kunth subsp. elata | 310150 | 317168 |
| Oenothera curvifolia H. P. Fisch. | Oenothera scabra K. Krause | | | Oenothera curvifolia H. P. Fisch. | Oenothera scabra K. Krause | 310151 | 100691 |
| Oenothera cespitosa Nutt. | | a | | Oenothera cespitosa Nutt. | | 310176 | |
| Oenothera franciscana Bartlett | Oenothera elata Kunth subsp. hookeri (Torr. & A. Gray) W. Dietr. & W. L. Wagner | | | Oenothera franciscana Bartlett | Oenothera elata Kunth subsp. hookeri (Torr. & A. Gray) W. Dietr. & W. L. Wagner | 310177 | 317167 |
| Oenothera primiveris A. Gray subsp. primiveris | Oenothera primiveris A. Gray | | i | Oenothera primiveris A. Gray subsp. primiveris | Oenothera primiveris A. Gray | 310178 | 310180 |
| Oenothera johnsonii Parry | Oenothera primiveris A. Gray | | | Oenothera johnsonii Parry | Oenothera primiveris A. Gray | 310179 | 310180 |
| Oenothera primiveris A. Gray | | a | | Oenothera primiveris A. Gray | | 310180 | |
| Oenothera triloba Nutt. | | a | | Oenothera triloba Nutt. | | 310181 | |
| Oenothera amoena Lehm. | Clarkia amoena (Lehm.) A. Nelson & J. F. Macbr. subsp. amoena | | | Oenothera amoena Lehm. | Clarkia amoena (Lehm.) A. Nelson & J. F. Macbr. subsp. amoena | 310183 | 310182 |
| Oenothera densiflora Lindl. | Epilobium densiflorum (Lindl.) Hoch & P. H. Raven | | | Oenothera densiflora Lindl. | Epilobium densiflorum (Lindl.) Hoch & P. H. Raven | 310186 | 416974 |
| Oenothera wolfii (Munz) P. H. Raven et al. | | a | | Oenothera wolfii (Munz) P. H. Raven et al. | | 310681 | |
| Oenothera hookeri Torr. & A. Gray subsp. wolfii Munz | Oenothera wolfii (Munz) P. H. Raven et al. | | i | Oenothera hookeri Torr. & A. Gray subsp. wolfii Munz | Oenothera wolfii (Munz) P. H. Raven et al. | 310682 | 310681 |
| Oenothera gracilis Schrad. ex Fisch. & C. A. Mey. | Oenothera perennis L. | | | Oenothera gracilis Schrad. ex Fisch. & C. A. Mey. | Oenothera perennis L. | 310847 | 100616 |
| Oenothera muricata L. | Oenothera biennis L. | | | Oenothera muricata L. | Oenothera biennis L. | 310849 | 25521 |
| Oenothera tetragona Roth | Oenothera fruticosa L. subsp. glauca (Michx.) Straley | | | Oenothera tetragona Roth | Oenothera fruticosa L. subsp. glauca (Michx.) Straley | 310850 | 100631 |
| Oenothera ammophila Focke | Oenothera oakesiana (A. Gray) J. W. Robbins ex S. Watson | | | Oenothera ammophila Focke | Oenothera oakesiana (A. Gray) J. W. Robbins ex S. Watson | 314077 | 100536 |
| Oenothera viminea Douglas | Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr. subsp. viminea (Douglas) F. H. Lewis & M. E. Lewis | | | Oenothera viminea Douglas | Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr. subsp. viminea (Douglas) F. H. Lewis & M. E. Lewis | 314811 | 314810 |
| Oenothera quadrivulnera Douglas ex Lindl. | Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr. subsp. quadrivulnera (Douglas ex Lindl.) F. H. Lewis & M. E. Lewis | | | Oenothera quadrivulnera Douglas ex Lindl. | Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr. subsp. quadrivulnera (Douglas ex Lindl.) F. H. Lewis & M. E. Lewis | 314812 | 314809 |
| Oenothera purpurea Curtis | Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr. subsp. purpurea | | | Oenothera purpurea Curtis | Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr. subsp. purpurea | 314815 | 314813 |
| Oenothera arcuata Kellogg | Clarkia arcuata (Kellogg) A. Nelson & J. F. Macbr. | | | Oenothera arcuata Kellogg | Clarkia arcuata (Kellogg) A. Nelson & J. F. Macbr. | 314824 | 314823 |
| Oenothera biloba Durand | Clarkia biloba (Durand) A. Nelson & J. F. Macbr. | | | Oenothera biloba Durand | Clarkia biloba (Durand) A. Nelson & J. F. Macbr. | 314835 | 314834 |
| Oenothera albicaulis Pursh | | a | | Oenothera albicaulis Pursh | | 316760 | |
| Oenothera canescens Torr. & Frém. | | a | | Oenothera canescens Torr. & Frém. | | 316761 | |
| Oenothera coronopifolia Torr. & A. Gray | | a | | Oenothera coronopifolia Torr. & A. Gray | | 316762 | |
| Oenothera flava (A. Nelson) Garrett | | a | | Oenothera flava (A. Nelson) Garrett | | 316763 | |
| Oenothera pallida Lindl. | | a | | Oenothera pallida Lindl. | | 316764 | |
| Oenothera parodiana Munz | | a | | Oenothera parodiana Munz | | 316765 | |
| Oenothera elata Kunth subsp. hookeri (Torr. & A. Gray) W. Dietr. & W. L. Wagner | | a | i | Oenothera elata Kunth subsp. hookeri (Torr. & A. Gray) W. Dietr. & W. L. Wagner | | 317167 | |
| Oenothera elata Kunth subsp. elata | | a | i | Oenothera elata Kunth subsp. elata | | 317168 | |
| Oenothera elata Kunth subsp. hirsutissima (A. Gray ex S. Watson) W. Dietr. | | a | i | Oenothera elata Kunth subsp. hirsutissima (A. Gray ex S. Watson) W. Dietr. | | 317169 | |
| Oenothera biennis L. var. hirsutissima A. Gray ex S. Watson | Oenothera elata Kunth subsp. hirsutissima (A. Gray ex S. Watson) W. Dietr. | | i | Oenothera biennis L. var.hirsutissima A. Gray ex S. Watson | Oenothera elata Kunth subsp. hirsutissima (A. Gray ex S. Watson) W. Dietr. | 317170 | 317169 |
| Oenothera cheiranthifolia Hornem. ex Spreng. | Camissoniopsis cheiranthifolia (Hornem. ex Spreng.) W. L. Wagner & Hoch subsp. cheiranthifolia | | | Oenothera cheiranthifolia Hornem. ex Spreng. | Camissoniopsis cheiranthifolia (Hornem. ex Spreng.) W. L. Wagner & Hoch subsp. cheiranthifolia | 317303 | 458568 |
| Oenothera lamarckiana auct. | Oenothera glazioviana Micheli | | | Oenothera lamarckiana auct. | Oenothera glazioviana Micheli | 317847 | 100525 |
| Oenothera ovata Nutt. ex Torr. & A. Gray | Taraxia ovata (Nutt. ex Torr. & A. Gray) Small | | | Oenothera ovata Nutt. ex Torr. & A. Gray | Taraxia ovata (Nutt. ex Torr. & A. Gray) Small | 318204 | 458609 |
| Oenothera cheiranthifolia Hornem. ex Spreng. var. suffruticosa S. Watson | Camissoniopsis cheiranthifolia (Hornem. ex Spreng.) W. L. Wagner & Hoch subsp. suffruticosa (S. Watson) W. L. Wagner & Hoch | | i | Oenothera cheiranthifolia Hornem. ex Spreng. var.suffruticosa S. Watson | Camissoniopsis cheiranthifolia (Hornem. ex Spreng.) W. L. Wagner & Hoch subsp. suffruticosa (S. Watson) W. L. Wagner & Hoch | 320113 | 458567 |
| Oenothera californica (S. Watson) S. Watson subsp. eurekensis (Munz & John C. Roos) W. M. Klein | | a | i | Oenothera californica (S. Watson) S. Watson subsp. eurekensis (Munz & John C. Roos) W. M. Klein | | 320115 | |
| Oenothera avita (W. E. Klein) W. E. Klein subsp. eurekensis (Munz & John C. Roos) W. M. Klein | Oenothera californica (S. Watson) S. Watson subsp. eurekensis (Munz & John C. Roos) W. M. Klein | | i | Oenothera avita (W. E. Klein) W. E. Klein subsp. eurekensis (Munz & John C. Roos) W. M. Klein | Oenothera californica (S. Watson) S. Watson subsp. eurekensis (Munz & John C. Roos) W. M. Klein | 320116 | 320115 |
| Oenothera deltoides Torr. & Frém. subsp. eurekensis Munz & John C. Roos | Oenothera californica (S. Watson) S. Watson subsp. eurekensis (Munz & John C. Roos) W. M. Klein | | i | Oenothera deltoides Torr. & Frém. subsp. eurekensis Munz & John C. Roos | Oenothera californica (S. Watson) S. Watson subsp. eurekensis (Munz & John C. Roos) W. M. Klein | 320117 | 320115 |
| Oenothera deltoides Torr. & Frém. subsp. howellii (Munz) W. M. Klein | | a | i | Oenothera deltoides Torr. & Frém. subsp. howellii (Munz) W. M. Klein | | 320118 | |
| Oenothera deltoides Torr. & Frém. var. howellii Munz | Oenothera deltoides Torr. & Frém. subsp. howellii (Munz) W. M. Klein | | i | Oenothera deltoides Torr. & Frém. var.howellii Munz | Oenothera deltoides Torr. & Frém. subsp. howellii (Munz) W. M. Klein | 320119 | 320118 |
| Oenothera stricta Ledeb. ex Link | | a | | Oenothera stricta Ledeb. ex Link | | 402121 | |
| Oenothera nutans G. F. Atk. & Bartlett | | a | | Oenothera nutans G. F. Atk. & Bartlett | | 410136 | |
| Oenothera biennis L. subsp. austromontana Munz | Oenothera nutans G. F. Atk. & Bartlett | | i | Oenothera biennis L. subsp. austromontana Munz | Oenothera nutans G. F. Atk. & Bartlett | 410137 | 410136 |
| Oenothera villosa Thunb. subsp. strigosa (Rydb.) W. Dietr. & P. H. Raven | | a | i | Oenothera villosa Thunb. subsp. strigosa (Rydb.) W. Dietr. & P. H. Raven | | 410140 | |
| Oenothera cheradophila Bartlett | Oenothera villosa Thunb. subsp. strigosa (Rydb.) W. Dietr. & P. H. Raven | | | Oenothera cheradophila Bartlett | Oenothera villosa Thunb. subsp. strigosa (Rydb.) W. Dietr. & P. H. Raven | 410143 | 410140 |
| Oenothera canovirens E. Steele | Oenothera villosa Thunb. subsp. villosa | | | Oenothera canovirens E. Steele | Oenothera villosa Thunb. subsp. villosa | 410144 | 100626 |
| Oenothera lindleyi Douglas | Clarkia amoena (Lehm.) A. Nelson & J. F. Macbr. subsp. lindleyi (Douglas) F. H. Lewis & M. E. Lewis | | | Oenothera lindleyi Douglas | Clarkia amoena (Lehm.) A. Nelson & J. F. Macbr. subsp. lindleyi (Douglas) F. H. Lewis & M. E. Lewis | 412387 | 412386 |
| Oenothera torreyi S. Watson | Epilobium torreyi (S. Watson) Hoch & P. H. Raven | | | Oenothera torreyi S. Watson | Epilobium torreyi (S. Watson) Hoch & P. H. Raven | 416976 | 416975 |
| Oenothera drummondii Hook. subsp. thalassaphila (Brandegee) W. Dietr. & W. L. Wagner | | a | i | Oenothera drummondii Hook. subsp. thalassaphila (Brandegee) W. Dietr. & W. L. Wagner | | 417881 | |
| Oenothera thalassaphila Brandegee | Oenothera drummondii Hook. subsp. thalassaphila (Brandegee) W. Dietr. & W. L. Wagner | | | Oenothera thalassaphila Brandegee | Oenothera drummondii Hook. subsp. thalassaphila (Brandegee) W. Dietr. & W. L. Wagner | 417882 | 417881 |
| Oenothera cespitosa Nutt. subsp. marginata (Nutt. ex Hook. & Arn.) Munz | | a | i | Oenothera cespitosa Nutt. subsp. marginata (Nutt. ex Hook. & Arn.) Munz | | 448006 | |
| Oenothera clelandii W. Dietr. et al. | | a | | Oenothera clelandii W. Dietr. et al. | | 449056 | |
| Oenothera picensis Phil. | | a | | Oenothera picensis Phil. | | 449459 | |
| Oenothera tafiensis W. Dietr. | | a | | Oenothera tafiensis W. Dietr. | | 449460 | |
| Oenothera arborea Kellogg | Xylonagra arborea (Kellogg) Donn. Sm. & Rose | | | Oenothera arborea Kellogg | Xylonagra arborea (Kellogg) Donn. Sm. & Rose | 450491 | 450490 |
| Oenothera linifolia Nutt. | | a | | Oenothera linifolia Nutt. | | 450993 | |
| Oenothera fruticosa L. | | a | | Oenothera fruticosa L. | | 451607 | |
| Oenothera californica (S. Watson) S. Watson subsp. californica | | a | i | Oenothera californica (S. Watson) S. Watson subsp. californica | | 452190 | |
| Oenothera andina Nutt. | Holmgrenia andina (Nutt.) W. L. Wagner & Hoch | | | Oenothera andina Nutt. | Holmgrenia andina (Nutt.) W. L. Wagner & Hoch | 453486 | 458556 |
| Oenothera brevipes A. Gray | Chylismia brevipes (A. Gray) Small subsp. brevipes | | | Oenothera brevipes A. Gray | Chylismia brevipes (A. Gray) Small subsp. brevipes | 453487 | 458559 |
| Oenothera parvula Nutt. ex Torr. & A. Gray | Camissonia parvula (Nutt. ex Torr. & A. Gray) P. H. Raven | | | Oenothera parvula Nutt. ex Torr. & A. Gray | Camissonia parvula (Nutt. ex Torr. & A. Gray) P. H. Raven | 453491 | 453490 |
| Oenothera hartwegii Benth. | | a | | Oenothera hartwegii Benth. | | 457211 | |
| Oenothera hexandra (Ortega) W. L. Wagner & Hoch | | a | | Oenothera hexandra (Ortega) W. L. Wagner & Hoch | | 457218 | |
| Oenothera hexandra (Ortega) W. L. Wagner & Hoch subsp. gracilis (Wooton & Standl.) W. L. Wagner & Hoch | | a | i | Oenothera hexandra (Ortega) W. L. Wagner & Hoch subsp. gracilis (Wooton & Standl.) W. L. Wagner & Hoch | | 457219 | |
| Oenothera brachycarpa A. Gray | | a | | Oenothera brachycarpa A. Gray | | 457223 | |
| Oenothera howardii (A. Nelson) W. L. Wagner | | a | | Oenothera howardii (A. Nelson) W. L. Wagner | | 457232 | |
| Oenothera californica (S. Watson) S. Watson | | a | | Oenothera californica (S. Watson) S. Watson | | 458033 | |
| Oenothera gaura W. L. Wagner & Hoch | | a | | Oenothera gaura W. L. Wagner & Hoch | | 458521 | |
| Oenothera suffrutescens (Ser.) W. L. Wagner & Hoch | | a | | Oenothera suffrutescens (Ser.) W. L. Wagner & Hoch | | 458522 | |
| Oenothera xenogaura W. L. Wagner & Hoch | | a | | Oenothera xenogaura W. L. Wagner & Hoch | | 458524 | |
| Oenothera hexandra (Ortega) W. L. Wagner & Hoch subsp. hexandra | | a | i | Oenothera hexandra (Ortega) W. L. Wagner & Hoch subsp. hexandra | | 458526 | |
| Oenothera lindheimeri (Engelm. & A. Gray) W. L. Wagner & Hoch | | a | | Oenothera lindheimeri (Engelm. & A. Gray) W. L. Wagner & Hoch | | 458527 | |
| Oenothera glaucifolia W. L. Wagner & Hoch | | a | | Oenothera glaucifolia W. L. Wagner & Hoch | | 458528 | |
| Oenothera curtiflora W. L. Wagner & Hoch | | a | | Oenothera curtiflora W. L. Wagner & Hoch | | 458529 | |
| Oenothera sinuosa W. L. Wagner & Hoch | | a | | Oenothera sinuosa W. L. Wagner & Hoch | | 458530 | |
| Oenothera cinerea (Wooton & Standl.) W. L. Wagner & Hoch | | a | | Oenothera cinerea (Wooton & Standl.) W. L. Wagner & Hoch | | 458531 | |
| Oenothera coloradensis (Rydb.) W. L. Wagner & Hoch | | a | | Oenothera coloradensis (Rydb.) W. L. Wagner & Hoch | | 458533 | |
| Oenothera coloradensis (Rydb.) W. L. Wagner & Hoch subsp. neomexicana (Wooton) W. L. Wagner & Hoch | | a | i | Oenothera coloradensis (Rydb.) W. L. Wagner & Hoch subsp. neomexicana (Wooton) W. L. Wagner & Hoch | | 458534 | |
| Oenothera coloradensis (Rydb.) W. L. Wagner & Hoch subsp. coloradensis | | a | i | Oenothera coloradensis (Rydb.) W. L. Wagner & Hoch subsp. coloradensis | | 458535 | |
| Oenothera hartwegii Benth. subsp. hartwegii | | a | i | Oenothera hartwegii Benth. subsp. hartwegii | | 458537 | |
| Oenothera hartwegii Benth. subsp. fendleri (A. Gray) W. L. Wagner & Hoch | | a | i | Oenothera hartwegii Benth. subsp. fendleri (A. Gray) W. L. Wagner & Hoch | | 458538 | |
| Oenothera hartwegii Benth. subsp. filifolia (Eastw.) W. L. Wagner & Hoch | | a | i | Oenothera hartwegii Benth. subsp. filifolia (Eastw.) W. L. Wagner & Hoch | | 458539 | |
| Oenothera hartwegii Benth. subsp. maccartii (Shinners) W. L. Wagner & Hoch | | a | i | Oenothera hartwegii Benth. subsp. maccartii (Shinners) W. L. Wagner & Hoch | | 458540 | |
| Oenothera hartwegii Benth. subsp. pubescens (A. Gray) W. L. Wagner & Hoch | | a | i | Oenothera hartwegii Benth. subsp. pubescens (A. Gray) W. L. Wagner & Hoch | | 458541 | |
| Oenothera greggii A. Gray var. pubescens A. Gray | Oenothera hartwegii Benth. subsp. pubescens (A. Gray) W. L. Wagner & Hoch | | i | Oenothera greggii A. Gray var.pubescens A. Gray | Oenothera hartwegii Benth. subsp. pubescens (A. Gray) W. L. Wagner & Hoch | 458542 | 458541 |
| Oenothera fendleri A. Gray | Oenothera hartwegii Benth. subsp. fendleri (A. Gray) W. L. Wagner & Hoch | | | Oenothera fendleri A. Gray | Oenothera hartwegii Benth. subsp. fendleri (A. Gray) W. L. Wagner & Hoch | 458545 | 458538 |
| Oenothera tubicula A. Gray var. filifolia Eastw. | Oenothera hartwegii Benth. subsp. filifolia (Eastw.) W. L. Wagner & Hoch | | i | Oenothera tubicula A. Gray var.filifolia Eastw. | Oenothera hartwegii Benth. subsp. filifolia (Eastw.) W. L. Wagner & Hoch | 458547 | 458539 |
| Oenothera tubicula A. Gray | | a | | Oenothera tubicula A. Gray | | 458552 | |
| Oenothera tubicula A. Gray subsp. tubicula | | a | i | Oenothera tubicula A. Gray subsp. tubicula | | 458553 | |
| Oenothera tubicula A. Gray subsp. strigulosa (Towner) W. L. Wagner & Hoch | | a | i | Oenothera tubicula A. Gray subsp. strigulosa (Towner) W. L. Wagner & Hoch | | 458554 | |
| Oenothera brevipes A. Gray subsp. arizonica P. H. Raven | Chylismia brevipes (A. Gray) Small subsp. arizonica (P. H. Raven) W. L. Wagner & Hoch | | i | Oenothera brevipes A. Gray subsp. arizonica P. H. Raven | Chylismia brevipes (A. Gray) Small subsp. arizonica (P. H. Raven) W. L. Wagner & Hoch | 458562 | 458560 |
| Oenothera brevipes A. Gray var. pallidula Munz | Chylismia brevipes (A. Gray) Small subsp. pallidula (Munz) W. L. Wagner & Hoch | | i | Oenothera brevipes A. Gray var.pallidula Munz | Chylismia brevipes (A. Gray) Small subsp. pallidula (Munz) W. L. Wagner & Hoch | 458565 | 458561 |
| Oenothera cruciformis Kellogg | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. cruciformis (Kellogg) W. L. Wagner & Hoch | | | Oenothera cruciformis Kellogg | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. cruciformis (Kellogg) W. L. Wagner & Hoch | 458592 | 458578 |
| Oenothera claviformis Torr. & Frém. subsp. integrior P. H. Raven | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. integrior (P. H. Raven) W. L. Wagner & Hoch | | i | Oenothera claviformis Torr. & Frém. subsp. integrior P. H. Raven | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. integrior (P. H. Raven) W. L. Wagner & Hoch | 458594 | 458576 |
| Oenothera claviformis Torr. & Frém. subsp. funerea P. H. Raven | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. funerea (P. H. Raven) W. L. Wagner & Hoch | | i | Oenothera claviformis Torr. & Frém. subsp. funerea P. H. Raven | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. funerea (P. H. Raven) W. L. Wagner & Hoch | 458595 | 458575 |
| Oenothera scapoidea Torr. & A. Gray var. aurantiaca Munz | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. aurantiaca (Munz) W. L. Wagner & Hoch | | i | Oenothera scapoidea Torr. & A. Gray var.aurantiaca Munz | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. aurantiaca (Munz) W. L. Wagner & Hoch | 458596 | 458569 |
| Oenothera claviformis Torr. & Frém. var. peeblesii Munz | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. peeblesii (Munz) W. L. Wagner & Hoch | | i | Oenothera claviformis Torr. & Frém. var.peeblesii Munz | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. peeblesii (Munz) W. L. Wagner & Hoch | 458597 | 458570 |
| Oenothera claviformis Torr. & Frém. var. peirsonii Munz | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. peirsonii (Munz) W. L. Wagner & Hoch | | i | Oenothera claviformis Torr. & Frém. var.peirsonii Munz | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. peirsonii (Munz) W. L. Wagner & Hoch | 458598 | 458571 |
| Oenothera claviformis Torr. & Frém. subsp. yumae P. H. Raven | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. yumae (P. H. Raven) W. L. Wagner & Hoch | | i | Oenothera claviformis Torr. & Frém. subsp. yumae P. H. Raven | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. yumae (P. H. Raven) W. L. Wagner & Hoch | 458599 | 458574 |
| Oenothera claviformis Torr. & Frém. subsp. wigginsii P. H. Raven | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. wigginsii (P. H. Raven) W. L. Wagner & Hoch | | i | Oenothera claviformis Torr. & Frém. subsp. wigginsii P. H. Raven | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. wigginsii (P. H. Raven) W. L. Wagner & Hoch | 458600 | 458573 |
| Oenothera claviformis Torr. & Frém. subsp. rubescens P. H. Raven | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. rubescens (P. H. Raven) W. L. Wagner & Hoch | | i | Oenothera claviformis Torr. & Frém. subsp. rubescens P. H. Raven | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. rubescens (P. H. Raven) W. L. Wagner & Hoch | 458601 | 458572 |
| Oenothera scapoidea Torr. & A. Gray var. tortilis Jeps. | Chylismia walkeri A. Nelson subsp. tortilis (Jeps.) W. L. Wagner & Hoch | | i | Oenothera scapoidea Torr. & A. Gray var.tortilis Jeps. | Chylismia walkeri A. Nelson subsp. tortilis (Jeps.) W. L. Wagner & Hoch | 458605 | 458604 |
| Oenothera multijuga S. Watson | Chylismia multijuga (S. Watson) Small | | | Oenothera multijuga S. Watson | Chylismia multijuga (S. Watson) Small | 458608 | 458607 |
| Oenothera siambonensis W. Dietr. | | a | | Oenothera siambonensis W. Dietr. | | 458611 | |
| Oenothera elongata Rusby | | a | | Oenothera elongata Rusby | | 458612 | |
| Oenothera indecora Cambess. | | a | | Oenothera indecora Cambess. | | 458613 | |
| Oenothera ravenii W. Dietr. | | a | | Oenothera ravenii W. Dietr. | | 458615 | |
| Oenothera cavernae Munz | | a | | Oenothera cavernae Munz | | 459190 | |
| Oenothera lavandulifolia Torr. & A. Gray | | a | | Oenothera lavandulifolia Torr. & A. Gray | | 460358 | |
| Oenothera macrocarpa Nutt. subsp. incana (A. Gray) W. L. Wagner | | a | i | Oenothera macrocarpa Nutt. subsp. incana (A. Gray) W. L. Wagner | | 461674 | |
| Oenothera macrocarpa Nutt. subsp. oklahomensis (Norton) W. L. Wagner | | a | i | Oenothera macrocarpa Nutt. subsp. oklahomensis (Norton) W. L. Wagner | | 461675 | |
| Oenothera macrocarpa Nutt. subsp. fremontii (S. Watson) W. L. Wagner | | a | i | Oenothera macrocarpa Nutt. subsp. fremontii (S. Watson) W. L. Wagner | | 461676 | |
| Oenothera macrocarpa Nutt. subsp. macrocarpa | | a | i | Oenothera macrocarpa Nutt. subsp. macrocarpa | | 461677 | |
| Oenothera macrocarpa Nutt. subsp. mexicana W. L. Wagner | | a | i | Oenothera macrocarpa Nutt. subsp. mexicana W. L. Wagner | | 461678 | |
| Oenothera fremontii S. Watson | Oenothera macrocarpa Nutt. subsp. fremontii (S. Watson) W. L. Wagner | | | Oenothera fremontii S. Watson | Oenothera macrocarpa Nutt. subsp. fremontii (S. Watson) W. L. Wagner | 461679 | 461676 |
| Oenothera missourensis Sims var. incana A. Gray | Oenothera macrocarpa Nutt. subsp. incana (A. Gray) W. L. Wagner | | i | Oenothera missourensis Sims var.incana A. Gray | Oenothera macrocarpa Nutt. subsp. incana (A. Gray) W. L. Wagner | 461680 | 461674 |
| Oenothera boothii Douglas | Eremothera boothii (Douglas) W. L. Wagner & Hoch | | | Oenothera boothii Douglas | Eremothera boothii (Douglas) W. L. Wagner & Hoch | 461864 | 461862 |
| Oenothera deltoides Torr. & Frém. | | a | | Oenothera deltoides Torr. & Frém. | | 462350 | |
| Oenothera scapoidea Torr. & A. Gray | Chylismia scapoidea (Torr. & A. Gray) Nutt. ex Raim. | | | Oenothera scapoidea Torr. & A. Gray | Chylismia scapoidea (Torr. & A. Gray) Nutt. ex Raim. | 462834 | 462832 |
| Oenothera bistorta Nutt. ex Torr. & A. Gray | Camissonia bistorta (Nutt. ex Torr. & A. Gray) P. H. Raven | | | Oenothera bistorta Nutt. ex Torr. & A. Gray | Camissonia bistorta (Nutt. ex Torr. & A. Gray) P. H. Raven | 463646 | 463643 |
| Oenothera berlandieri (Spach) Steud. | | a | | Oenothera berlandieri (Spach) Steud. | | 463823 | |
| Oenothera pallida Lindl. subsp. trichocalyx (Nutt.) Munz & W. M. Klein | | a | i | Oenothera pallida Lindl. subsp. trichocalyx (Nutt.) Munz & W. M. Klein | | 464042 | |
| Oenothera pallida Lindl. subsp. pallida | | a | i | Oenothera pallida Lindl. subsp. pallida | | 464043 | |
| Oenothera trichocalyx Nutt. | Oenothera pallida Lindl. subsp. trichocalyx (Nutt.) Munz & W. M. Klein | | | Oenothera trichocalyx Nutt. | Oenothera pallida Lindl. subsp. trichocalyx (Nutt.) Munz & W. M. Klein | 464044 | 464042 |
| Oenothera deltoides Torr. & Frém. subsp. piperi (Munz) W. M. Klein | | a | i | Oenothera deltoides Torr. & Frém. subsp. piperi (Munz) W. M. Klein | | 464487 | |
| Oenothera deltoides Torr. & Frém. var. piperi Munz | Oenothera deltoides Torr. & Frém. subsp. piperi (Munz) W. M. Klein | | i | Oenothera deltoides Torr. & Frém. var.piperi Munz | Oenothera deltoides Torr. & Frém. subsp. piperi (Munz) W. M. Klein | 464488 | 464487 |
| Oenothera refracta S. Watson | Eremothera refracta (S. Watson) W. L. Wagner & Hoch | | | Oenothera refracta S. Watson | Eremothera refracta (S. Watson) W. L. Wagner & Hoch | 466007 | 466008 |
| Oenothera pallida Lindl. subsp. runcinata (Engelm.) Munz & W. M. Klein | | a | i | Oenothera pallida Lindl. subsp. runcinata (Engelm.) Munz & W. M. Klein | | 466460 | |
| Oenothera pallida Lindl. var. runcinata (Engelm.) Cronquist | Oenothera pallida Lindl. subsp. runcinata (Engelm.) Munz & W. M. Klein | | i | Oenothera pallida Lindl. var.runcinata (Engelm.) Cronquist | Oenothera pallida Lindl. subsp. runcinata (Engelm.) Munz & W. M. Klein | 466461 | 466460 |
| Oenothera albicaulis Pursh var. runcinata Engelm. | Oenothera pallida Lindl. subsp. runcinata (Engelm.) Munz & W. M. Klein | | i | Oenothera albicaulis Pursh var.runcinata Engelm. | Oenothera pallida Lindl. subsp. runcinata (Engelm.) Munz & W. M. Klein | 466462 | 466460 |
| Oenothera filiformis (Small) W. L. Wagner & Hoch | | a | | Oenothera filiformis (Small) W. L. Wagner & Hoch | | 466816 | |
| Oenothera cespitosa Nutt. subsp. cespitosa | | a | i | Oenothera cespitosa Nutt. subsp. cespitosa | | 467133 | |
| Oenothera deltoides Torr. & Frém. var. decumbens (Parry) Munz | Oenothera deltoides Torr. & Frém. subsp. ambigua (Munz) W. M. Klein | | i | Oenothera deltoides Torr. & Frém. var.decumbens (Parry) Munz | Oenothera deltoides Torr. & Frém. subsp. ambigua (Munz) W. M. Klein | 467541 | 467542 |
| Oenothera deltoides Torr. & Frém. subsp. ambigua (Munz) W. M. Klein | | a | i | Oenothera deltoides Torr. & Frém. subsp. ambigua (Munz) W. M. Klein | | 467542 | |
| Oenothera deltoides Torr. & Frém. var. ambigua Munz | Oenothera deltoides Torr. & Frém. subsp. ambigua (Munz) W. M. Klein | | i | Oenothera deltoides Torr. & Frém. var.ambigua Munz | Oenothera deltoides Torr. & Frém. subsp. ambigua (Munz) W. M. Klein | 467543 | 467542 |
| Oenothera hirtella Greene | Camissoniopsis hirtella (Greene) W. L. Wagner & Hoch | | | Oenothera hirtella Greene | Camissoniopsis hirtella (Greene) W. L. Wagner & Hoch | 467684 | 467682 |
| Oenothera guadalupensis S. Watson subsp. clementina P. H. Raven | Camissoniopsis guadalupensis (S. Watson) W. L. Wagner & Hoch subsp. clementina (P. H. Raven) W. L. Wagner & Hoch | | i | Oenothera guadalupensis S. Watson subsp. clementina P. H. Raven | Camissoniopsis guadalupensis (S. Watson) W. L. Wagner & Hoch subsp. clementina (P. H. Raven) W. L. Wagner & Hoch | 467950 | 467949 |
| Oenothera guadalupensis S. Watson | Camissoniopsis guadalupensis (S. Watson) W. L. Wagner & Hoch subsp. guadalupensis | | | Oenothera guadalupensis S. Watson | Camissoniopsis guadalupensis (S. Watson) W. L. Wagner & Hoch subsp. guadalupensis | 467953 | 467948 |
| Oenothera wigginsii W. M. Klein | | a | | Oenothera wigginsii W. M. Klein | | 467979 | |
| Oenothera deltoides Torr. & Frém. subsp. cognata (Jeps.) W. M. Klein | | a | i | Oenothera deltoides Torr. & Frém. subsp. cognata (Jeps.) W. M. Klein | | 468137 | |
| Oenothera deltoides Torr. & Frém. subsp. deltoides | | a | i | Oenothera deltoides Torr. & Frém. subsp. deltoides | | 468138 | |
| Oenothera paradoxa Hudziok | | a | | Oenothera paradoxa Hudziok | | 475445 | |
| Oenothera decorticans (Hook. & Arn.) Greene var. desertorum Munz | Eremothera boothii (Douglas) W. L. Wagner & Hoch subsp. desertorum (Munz) W. L. Wagner & Hoch | | i | Oenothera decorticans (Hook. & Arn.) Greene var.desertorum Munz | Eremothera boothii (Douglas) W. L. Wagner & Hoch subsp. desertorum (Munz) W. L. Wagner & Hoch | 475462 | 475460 |
| Oenothera boothii Douglas subsp. desertorum (Munz) Munz | Eremothera boothii (Douglas) W. L. Wagner & Hoch subsp. desertorum (Munz) W. L. Wagner & Hoch | | i | Oenothera boothii Douglas subsp. desertorum (Munz) Munz | Eremothera boothii (Douglas) W. L. Wagner & Hoch subsp. desertorum (Munz) W. L. Wagner & Hoch | 475463 | 475460 |
| Oenothera pilosella Raf. | | a | | Oenothera pilosella Raf. | | 477563 | |
| Oenothera pilosella Raf. subsp. sessilis (Pennell) Straley | | a | i | Oenothera pilosella Raf. subsp. sessilis (Pennell) Straley | | 477564 | |
| Oenothera pilosella Raf. subsp. pilosella | | a | i | Oenothera pilosella Raf. subsp. pilosella | | 477565 | |
| Oenothera engelmannii Munz | | a | | Oenothera engelmannii Munz | | 478039 | |
| Oenothera kernensis Munz | Camissonia kernensis (Munz) P. H. Raven | | | Oenothera kernensis Munz | Camissonia kernensis (Munz) P. H. Raven | 478501 | 478498 |
| Oenothera dentata Cav. var. gilmanii Munz | Camissonia kernensis (Munz) P. H. Raven subsp. gilmanii (Munz) P. H. Raven | | i | Oenothera dentata Cav. var.gilmanii Munz | Camissonia kernensis (Munz) P. H. Raven subsp. gilmanii (Munz) P. H. Raven | 478502 | 478500 |
| Oenothera cardiophylla Torr. | Chylismia cardiophylla (Torr.) Small | | | Oenothera cardiophylla Torr. | Chylismia cardiophylla (Torr.) Small | 480534 | 480533 |
| Oenothera cardiophylla Torr. subsp. robusta P. H. Raven | Chylismia cardiophylla (Torr.) Small subsp. robusta (P. H. Raven) W. L. Wagner & Hoch | | i | Oenothera cardiophylla Torr. subsp. robusta P. H. Raven | Chylismia cardiophylla (Torr.) Small subsp. robusta (P. H. Raven) W. L. Wagner & Hoch | 480535 | 480537 |
| Oenothera decorticans (Hook. & Arn.) Greene var. decorticans | Eremothera boothii (Douglas) W. L. Wagner & Hoch subsp. decorticans (Hook. & Arn.) W. L. Wagner & Hoch | | i | Oenothera decorticans (Hook. & Arn.) Greene var.decorticans | Eremothera boothii (Douglas) W. L. Wagner & Hoch subsp. decorticans (Hook. & Arn.) W. L. Wagner & Hoch | 481189 | 467679 |
| Oenothera decorticans (Hook. & Arn.) Greene | Eremothera boothii (Douglas) W. L. Wagner & Hoch subsp. decorticans (Hook. & Arn.) W. L. Wagner & Hoch | | | Oenothera decorticans (Hook. & Arn.) Greene | Eremothera boothii (Douglas) W. L. Wagner & Hoch subsp. decorticans (Hook. & Arn.) W. L. Wagner & Hoch | 481190 | 467679 |
| Oenothera decorticans (Hook. & Arn.) Greene var. condensata Munz | Eremothera boothii (Douglas) W. L. Wagner & Hoch subsp. condensata (Munz) W. L. Wagner & Hoch | | i | Oenothera decorticans (Hook. & Arn.) Greene var.condensata Munz | Eremothera boothii (Douglas) W. L. Wagner & Hoch subsp. condensata (Munz) W. L. Wagner & Hoch | 481191 | 481193 |
| Oenothera cespitosa Nutt. subsp. crinita (Rydb.) Munz | | a | i | Oenothera cespitosa Nutt. subsp. crinita (Rydb.) Munz | | 482198 | |
| Oenothera missourensis Sims var. missourensis | Oenothera macrocarpa Nutt. | | i | Oenothera missourensis Sims var.missourensis | Oenothera macrocarpa Nutt. | 485230 | 100623 |