| Name | Description |
|---|---|
| astrictus |
drawn together |
| ater |
black |
| atra |
black |
| atrata |
black |
| atratus |
black |
| atro- |
prefix meaning very dark |
| atropurpurea |
dark purple |
| atropurpureus |
dark purple |
| atrosanguinea |
deep red |
| atrosanguineus |
deep red |
| atrovirens |
dark green |
| atrum |
black |
| attenuata |
weak |
| attenuatus |
weak |
| aureata |
with gold |
| aureatus |
with gold |
| aureo-reticulata |
with a gold net |
| aureo-reticulatus |
with a gold net |
| aurescens |
becoming golden |
| auroralis |
of the morning |
| aurorea |
pink |
| auroreus |
pink |
| australe |
southern |
| australis |
southern |
| avenoides |
oat like |