| 11. | The two stamens are fused near the top of the corolla tube, with bilobed stigma.
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| 12. | The corolla tubes are either shorter or longer than the throats, which are funnelform to campanulate.
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| 13. | Furthermore, those specimens with a curved corolla tube, at one stage known as " R . notiale"
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| 14. | The corolla tube is about 3.5cm long.
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| 15. | Its fragrant flowers feature a white turning red and purple corolla tube, yellow with purple streaks inside.
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| 16. | Stamens are attached near the base of the corolla tube and have slender filaments with arrow-shaped anthers.
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| 17. | Corolla tube 5-lobed, the lobes usually unequal.
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| 18. | "X . virginica " have unique maxillae that are designed to perform perforations on corolla tubes to reach nectaries.
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| 19. | Research has shown that individuals with sharp galae can use these to further aid in penetrating the corolla tubes.
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| 20. | The species is morphologically similar to the genus " Cuviera " but differs by having long, slender corolla tubes.
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