Vegetative key to the families

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TENDRILS present on stem or leaves; plants climbing or decumbent
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Tendrils (modified pinnae) at the end of a leaf, or the tip of the leaf prolonged into a coil
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Leaf tip prolonged into a coil. Leaves with parallel venation and a basal closed sheath. Plant bamboo-like Flagellariaceae
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Leaves compound, the terminal pinnae modified into tendrils