Chiastophyllum oppositifolium (9cm)

A shade loving relative to sedums oppositifolium forms a low mound of  toothed, fleshy, ovate green leaves.  Arching racemes of small bright yellow flowers on reddish brown stems to around 20cm in late spring and early summer. Likes a cool, free draining site in part shade. Fully evergreen in mild winters. Especially suited to cracks in north facing rockeries or walls, steps etc.