This species is a favorite among those who like "heart-shaped" leaves. R. williamsianum has a petite character, growing only 2-3 ft wide and less high. Great for the rock garden, or where the foliage can be in contrast to other leaf shapes. The flowers are a clear, light-pink in loose clusters.Rare Variety – This variety is difficult to find anywhere due to these reasons
· Hard to propagate – many cultivars do not root easily from cuttings, but at a reduced rate thus making the plant rare.
· Hard to find – these cultivars are hard to find in the first place, probably because they are hard to root from cuttings