Clematis.

Socrates famously said: "All I know is that I know nothing." As I look into the baffling and befuddling amount of species and variants of Clematis, that is the phrase which emerges out of the fog. My illustration is of "Helsingborg", and it is but the tip of the iceborg.

Clematis.
(Perennial shrub.)

Planting: Spring or early autumn.
Flowering: Winter to late summer.

Aspect: Sun or partial shade.
Hardiness: Mostly full hardiness.

Notes: Much like the plant itself, the names for Clematis are many- including "old man's beard", "traveller's joy" and "virgin's bower".