A key to the newly circumscribed Arytera, Cupaniopsis and allied genera

The following key is adapted from REYNOLDS (1985b).

1. Calyx lobes free (sometimes sepals basally united), orbicular, elliptic or obovate, concave .................................... 2

1a. Calyx shortly cupular, the lobes toothed or partite, usually ovate ............................................................................ 4

2. Scales absent from petals ............................ Lepiderema

2a. Scales present on petals ............................................... 3

3. Scales present on vegetative and fertile organs ............... ............................................................... Lepidocupania

3a. Scales absent from vegetative and fertile organs ............. ................................................................... Cupaniopsis

4. Petal scales crested ............................................. Synima

4a. Petal scales not crested ................................................ 5

5. Petal scales adnate to the petal margin or free from the petals; central axis of fruit not thickened .......... Arytera

5a. Petal scales comprising minute enations; central axis of fruit distinctly thickened ............................. Neoarytera