This is a tough, low-growing groundcover, with funnel-shaped, purple flowers opening in the warmer months. It thrives in sun or shade and forms a good groundcover in difficult areas. It is quite drought tolerant and it should be trimmed back in late winter to keep it neat. A decoction of the leaves is given for weakness and the leaves are also used for ear complaints. named for Jean Ruel ( 1474-1537) who was a French physician and priest who wrote a treatise on botany, a massive work which is 666 pages long.