| 1. | The blue, white or lilac flowers are held in umbels.
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| 2. | The inflorescence is a compound umbel of flowers with white petals.
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| 3. | The flowers are grouped into umbels or other kinds of clusters.
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| 4. | The plant produces many small white flowers in a compound umbel.
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| 5. | Four or more bracts are present under the umbel at first.
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| 6. | The inflorescence is topped with a dense umbel of whitish flowers.
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| 7. | They feed on the unexpanded umbels still enclosed within their sheaths.
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| 8. | Umbel is densely crowded with many red or dark purple flowers.
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| 9. | The inflorescence is an umbel of white flowers with purplish centers.
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| 10. | The flowers are yellow in color and borne on compound umbels.
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