| Lobation patterns can be loosely classified as pinnate, binate, or ternate. |
| The leaves are sharply serrated, never pinnate or pinnatifid, sometimes the serration is confined to the apices. |
| The most common elements are parallel-veined leaves that resemble cordaites but that could be isolated pinnules of a pinnate leaf. |
| Immatures have a weakly developed taproot, and have pinnate compound leaves with two or three leaflets. |
| They produced several types of foliage all characterized by pinnate leaves with open dichotomous venation. |
| In 1794, Moench named A. tuberosa and described it as having tuberous roots, unevenly pinnate leaflets, and purple flowers in lateral racemes. |
