| 1. | The outer three tepal lobes are narrower than the inner three.
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| 2. | The flowers are white to red, with spirally arranged tepals.
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| 3. | The flowers have light blue or whitish tepals and yellow anthers.
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| 4. | Green flowers with six tiny tepals are borne in the axils.
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| 5. | The flower has six yellow tepals each under a centimeter long.
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| 6. | Dark markings are found at the base of the outer tepals.
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| 7. | The relevant bracts are lanceolate and much longer than the tepals.
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| 8. | Each tepal may have a darker midstripe of most any color.
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| 9. | The tepals are fused at the base forming a distinct tube.
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| 10. | Each flower has six blue tepals, forming a star shape.
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