Lewisia oppositifolia 'Richeyi' This is a small, high-altitude form of Lewisia oppositifolia, and for once it is the more desirable form that is easier to grow. It has rosettes of small, narrow leaves, and the flower stems tend to be prostrate, rather than standing upright. The white flowers are in groups of two or three. It comes from serpentine soils in the Siskiyou Mountains in Oregon, but probably any really gritty soil will suit it.