| 11. | Flower heads have white or bluish ray florets and yellow disc florets.
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| 12. | The heads contain blue or lavender disc florets but no ray florets.
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| 13. | Its flower heads have pale purple ray florets surrounding yellow disc florets.
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| 14. | The frilly ray florets are rectangular with flat or slightly toothed tips.
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| 15. | It produces yellow flower heads with both ray florets and disc florets.
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| 16. | Each head contains 12 24 blue ray florets but no disc florets.
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| 17. | Its flower heads have bright purple ray florets surrounding yellow disc florets.
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| 18. | Yellow flowers without ray florets form on panicles in November to January.
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| 19. | Each head has 5 white disc florets but no ray florets.
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| 20. | It has yellow flowers with both ray florets and disc florets.
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