When in Spain last year, I found this spectacular scrambling shrub running all along the wall of a house and was astonished at the 10" long and 7" wide chalice-shaped golden yellow flowers, which turn deeper gold with age.
It has taken me a long time to discover its name. The house owner told me all about it....in Spanish. It is also known as Cup Of Gold or Hawaiian Lily, and is a thick-stemmed tropical Liana, a vigorous and rampant grower which requires plenty of space and a strong support. Its thick and woody ropelike stems can run for more than 200ft, scrambling over everything in its way.
The 5 lobes of the corolla are reflexed, and each lobe is marked with a narrow purplish brown ridge on the inside. They are fragrant, with a scent reminiscent of coconut.
There are 8 species of chalice vines, but this one, Solandra Maxima, is the most common. They are related to Angel Trumpets (another lovely name), and like them, have hallucinogenic properties, but beware because they are also poisonous.