| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| ARRNEB | B-7974-102-1Y-2Y-2M-0Y[2964]; | TR.SE | S | MEX | |
| ARROCO | TR.AE | W | ITA | ||
| ARROMANCHES | K-45573; PI-315968; ERGE-1587 | TR.AE | W | FRA | |
| ARROW,AUS | AUS-13888 | TR.AE | AUS:New-South-Wales | ||
| ARROWHEAD | TR.AE | W | USA | ||
| ARROWSMITH | PI-633911; | NW-97-S-182[2902][2965][3292]; NSGC-9355[2965]; | TR.AE | W | USA:Nebraska |
| ARROW,USA | K-49850; CI-15079 | NY-5751-AB-3-B-9[860]; | TR.AE | W | USA:New-York |
| ARRUDA | K-3335 | B-6912-0PRT[2964]; | TR.SE | S | PRT |
| ARS-09-253 | TR.AE | W | USA | ||
| ARS-09-589 | TR.AE | W | USA | ||
| ARS-09-670 | TR.AE | W | USA | ||
| ARS-09-755 | TR.AE | W | USA | ||
| ARS-15142 | PI-658064 | TR.AE | W | USA:Washington | |
| ARS-15144 | PI-658063 | TR.AE | W | USA:Washington | |
| ARS-92-302 | PI-631090 | TR.AE | W | USA:Washington | |
| ARS-92-303 | PI-631091 | TR.AE | W | USA:Washington | |
| ARS-92-304 | PI-631092 | TR.AE | W | USA:Washington | |
| ARS-92-305 | PI-631093 | TR.AE | W | USA:Washington | |
| ARS-92-306 | PI-631094 | TR.AE | W | USA:Washington | |
| ARS-92-307 | PI-631095 | TR.AE | W | USA:Washington |