| 21. | Umbel is spherical, crowded with many white or pinkish flowers.
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| 22. | Flowers are small but numerous, in umbels of many flowers.
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| 23. | Flowers are pale greenish yellow produced in large compound umbels.
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| 24. | The inflorescences are dense umbels at the top of the main branches.
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| 25. | The flowers are produced in umbels of 7-11.
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| 26. | Umbels are spherical with a large number of white flowers.
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| 27. | The stem is topped with an umbel of up to 25 flowers.
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| 28. | The plant has white to greenish flowers in umbrella-like umbels.
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| 29. | Yellow flowers occur on terminal umbels, mostly in spring and summer.
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| 30. | The inflorescence is a small umbel of tiny purple flowers.
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