Vegetative key to the families

TENDRILS present on stem or leaves; plants climbing or decumbent
Tendrils (modified pinnae) at the end of a leaf, or the tip of the leaf prolonged into a coil
Leaves compound, the terminal pinnae modified into tendrils
Trailing herbs with stems less than 1m long. Leaflets 2–10 pairs (Vicia) Fabaceae
Stems several metres long, climbing. Leaflets 2–3 pairs Polemoniaceae