Vegetative key to the families

ROOTLESS EPIPHYTIC PARASITES.
Either; stems robust, erect or pendulous and with well developed leaves; or, stems flat, 3–9 mm wide and bearing scale-like leaves
Leaves reduced to scales (previously Viscaceae) Santalaceae
Plants not parasitic on branches. May be parasitic on the roots of another species
Leaves reduced to minute scales or rudimentary
Leaves conspicuously developed