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