| Common Name | Scientific Name | Code |
| n/a | Aesculus ?arnoldiana Sarg. [excluded] | AEAR5 |
| n/a | Aesculus ?bushii Schneid. (pro sp.) [glabra ? pavia] | AEBU |
| n/a | Aesculus ?hybrida DC. (pro sp.) [flava ? pavia] | AEHY |
| n/a | Aesculus ?marylandica Booth ex Kirchn. [flava ? glabra] | AEMA2 |
| n/a | Aesculus ?mutabilis (Spach) Scheele [pavia ? sylvatica] | AEMU |
| n/a | Aesculus ?neglecta Lindl. (pro sp.) [flava ? sylvatica] | AENE |
| n/a | Aesculus ?worlitzensis Koehne (pro sp.) [flava ? (pavia ? sylvatica)] | AEWO |
| Aesculus ?bushii | Aesculus ?mississippiensis Sarg. | AEMI |
| Aesculus ?mutabilis | Aesculus ?harbisonii Sarg. | AEHA |
| Aesculus ?neglecta | Aesculus ?glaucescens Sarg. | AEGL2 |
| Aesculus ?worlitzensis | Aesculus dupontii Sarg. | AEDU |
| Aesculus flava | Aesculus octandra Marsh. | AEOC2 |
| Aesculus flava | Aesculus octandra Marsh. var. vestita Sarg. | AEOCV |
| Aesculus flava | Aesculus octandra Marsh. var. virginica Sarg. | AEOCV2 |
| Aesculus glabra var. arguta | Aesculus arguta Buckl. | AEAR2 |
| Aesculus glabra var. arguta | Aesculus glabra Willd. var. buckleyi Sarg. | AEGLB |
| Aesculus glabra var. glabra | Aesculus glabra Willd. var. leucodermis Sarg. | AEGLL |
| Aesculus glabra var. glabra | Aesculus glabra Willd. var. micrantha Sarg. | AEGLM |
| Aesculus glabra var. glabra | Aesculus glabra Willd. var. monticola Sarg. | AEGLM2 |
| Aesculus glabra var. glabra | Aesculus glabra Willd. var. pallida (Willd.) Kirchn. | AEGLP |
| Aesculus glabra var. glabra | Aesculus glabra Willd. var. sargentii Rehd. | AEGLS |
| Aesculus pavia var. pavia | Aesculus austrina Small | AEAU |
| Aesculus pavia var. pavia | Aesculus discolor Pursh | AEDI |
| Aesculus pavia var. pavia | Aesculus discolor Pursh var. mollis (Raf.) Sarg. | AEDIM |
| Aesculus pavia var. pavia | Aesculus pavia L. var. discolor (Pursh) Gray | AEPAD |
| Aesculus pavia var. pavia | Aesculus splendens Sarg. | AESP |
| Aesculus sylvatica | Aesculus georgiana Sarg. | AEGE2 |
| Aesculus sylvatica | Aesculus sylvatica Bartr. var. lanceolata (Sarg.) Bartr. | AESYL |
| bottlebrush buckeye | Aesculus parviflora Walt. | AEPA2 |
| buckeye | Aesculus L. | AESCU |
| California buckeye | Aesculus californica (Spach) Nutt. | AECA |
| horse chestnut | Aesculus hippocastanum L. | AEHI |
| Japanese horse chestnut | Aesculus turbinata Blume | AETU |
| Ohio buckeye | Aesculus glabra Willd. | AEGL |
| Ohio buckeye | Aesculus glabra Willd. var. arguta (Buckl.) B.L. Robins. | AEGLA |
| Ohio buckeye | Aesculus glabra Willd. var. glabra | AEGLG |
| painted buckeye | Aesculus sylvatica Bartr. | AESY |
| red buckeye | Aesculus pavia L. | AEPA |
| red buckeye | Aesculus pavia L. var. flavescens (Sarg.) Correll | AEPAF |
| red buckeye | Aesculus pavia L. var. pavia | AEPAP |
| red horse-chestnut | Aesculus ?carnea Hayne [hippocastanum ? pavia] | AECA2 |
| yellow buckeye | Aesculus flava Ait. | AEFL |