Digitalis obscura

A very distinct small, almost shrubby foxglove from Spain with 8-10in spikes of brownish orange glossy flowers over narrow evergreen leaves. 

Quite charming and generally hardy in the southern portion of the UK, especially in drier areas but worthy of a special place in a sunny raised bed or container.

£8

Lotononis galpinii

 A remarkable South African shrub in the pea family with tiny silver leaflets and violet flowers. 

Very rare and not tried outdoors in the UK as far as I know but cold hardy here with minimal protection.

£12

Nonea pulla

A distinctive Eastern European relative of Pulmonaria and Cynoglossum with black flowers and grey foliage. Easy to grow in a sunny well drained place.

£6

Sutherlandia montana

An excellent and easy small shrub from S.Africa. The big vivid scarlet pea flowers in spring are perfectly complemented by the silver edged fine pinnate leaves. The papery coppery seed pods are a bonus later on. 

Although this seems to be quite cold tolerant and long-lived in a pot I’ve never managed to get it going in the ground, and I have no idea why. A very well-drained sheltered sunny, maybe maritime site might suit it but primarily I recommend it as a container plant.

£12