Now lumped under P. bilorum, but to me, seems incorrect. From Japan and Korea, Tiny 12 cm growths with almost round leaves and small solitary hanging greenish white flowers in the leaf axils. Spreading to make nice tight clumps in the peat garden. From central Europe through Turkey to west Russia. Green tipped bell shaped flowers that are whitish green.
Stems have a some what zig-zag appearance.
A shorter form than the species is usually grown. Grows fast and forms large groups. Leaves are 2-3 inches long, with fine hairs on the veins under the leaves. An excellent pot subject but also good in a rock garden or the front of the border. A slowly spreading upright small leaved species.