Vegetative key to the families

PHYLLODES present with a raised or depressed extra-floral nectary on the adaxial edge, hanging or standing with the nectary uppermost. (A few species of Acacia with exceptional additional structures are included in the key below) (Mimosoideae Fabaceae
Filaments connate basally into a tube
Pinnae 6–12 pairs per leaf; pinnules 20–40 pairs per pinna Paraserianthes
Pinnae usually 1–2 pairs per leaf; pinnules 3–4 pairs per pinna Pararchidendron