japonicum, a perennial of 10-20cm in height found in damp
forests, wears long white hairs and sends out no runners. Flowers:
calyx lobes open flat, stamens are numbering 4 or 8 in all, anthers
yellow. Leave-on-stems, 1-2 in number, are of alternate phyllotaxis,
each in a roundish kidney shape, 1-3cm in length, with flat
serrations on the margins. Flower stalks bear hairy propagules at
the bases. Bloom time: March-April..