The veins of a sunlit trumpet vine flower lead bees to the nectar in the shady depths.
In Paris parks Campsis radicans seems to be a well-behaved ornamental. In North America it has the reputation of a horticultural thug. A contributor to the Wikipedia page on the species issues an eloquent warning:
‘The vigor of the trumpet vine should not be underestimated. In warm weather, it puts out huge numbers of tendrils that grab onto every available surface, and eventually expand into heavy woody stems several centimeters in diameter. It grows well on arbors, fences, telephone poles, and trees, although it may dismember them in the process. Ruthless pruning is recommended.’