Saxifraga cuneifolia

Similar to, but leaves less shield shaped, than the lesser Londonpride. This plant is small and yet extremely tough, tolerating almost any neglect. I have used it in troughs with succulents like Sempervivums to great effect. It doesn't seem to flower for me, but the flowers are white, a lack of flowers is no real loss as the foliage and the small plant-lets leaping from the rosette are interesting enough in themselves.