Lampranthus belongs to the aizoaceae family and I have seen it referred to elsewhere as the perennial mesembryanthemum.   This one, in the image, was growing in the Alpine House of the Royal Horticultural Society's (RHS) gardens at Harlow Carr.  It is a striking yellow and if you look carefully at the image, you will see that it is absolutely full of fat buds almost ready to burst open. 

Lampranthus yellow

My RHS Gardeners' Encyclopaedia of Plants and Flowers describes it as a perennial succulent that is suitable for beds in arid conditions.  It is frost tender, minimum 5C (41F) if dry.  It needs full sun and well-drained soil.