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
Leaf tip prolonged into a coil. Leaves with parallel venation and a basal closed sheath. Plant bamboo-like Flagellariaceae
Leaves compound, the terminal pinnae modified into tendrils