var. japonica is a perennial seen in grasslands in fields
and mountains, stem growing to 40-100cm in height, generally without
branching. Three to four leaves attach to the branch in whorls,
occasionally opposite or alternate. The shoot apex bears panicles,
each arranging flowers in whorls at some intervals, the 1-3
bell-shaped corollas light purple, at times, white, the tips
5-cleft, more open. Bloom time: August-October.