| 11. | Wing venation : Only one recurrent vein, or no recurrent veins.
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| 12. | The flower has five white petals with light green venation.
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| 13. | The blades are glossy blue-green with silvery venations.
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| 14. | In some very small insects, the venation may be greatly reduced.
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| 15. | The yellowish venation is conspicuous, particularly on the underside.
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| 16. | Leaf venation is prominent on both sides, with a raised midrib.
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| 17. | Leaf venation is clearly seen above and below the leaf.
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| 18. | Lateral and net venation is clearly seen on both sides.
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| 19. | Leaf venation is more easily seen on the top of the leaf.
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| 20. | Leaf venation is easily noticed, particularly on the underside.
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