|Polygara japonica is a
perennial herb inhabiting sunny fields and mountains with haired
stems. The stems crawl on the ground and grow diagonally upward to
around 10-20cm in height. Leave are alternate, in an oval to
long-oblong shape, 1-3cm in length, with short petioles and pointed
tips. Axils on the upper parts of the stems emerge short racemes
with purple-tinged flowers shaped like a butterfly. Sepals are 5 in
number; petaloid side-sepals being oval to oblong, 6mm long, and
purple, enhance after flower, to 1cm becoming green. Petals, 3, are
connate at the bases, and one of them cut itself in at the tips.
Bloom time: April-July.