has a long blooming period, reflecting the wide range of locations and elevations it inhabits. Flowers are produced singly, attached by a slender, hairless, green or reddish stalk that rises slightly above the leaves. The flowers are about half an inch in diameter, formed of five white petals; the uppermost two are angled outwards, while the lowest projects forwards, and forms a short spur at the rear. The two side petals usually have a few white hairs near the base, and the lower three petals are crossed by dark purple lines at the base.
The (usually) hairless leaves grow at the base - plants are essentially stemless - and number between two and six. Leaves are ovate in shape, or cordate; projecting downwards either side of the attachment point. Leaf margins may be shallowly toothed, or entire. Leaves are held on stalks up to 4 inches long. The fruit is a short, green capsule containing many spherical brown seeds.