Changes

*A perennial or semi-shrubby, variably succulent herb up to 100(-120) cm tall, non-tuberous; leaves .*Leaves broadly ovate, suborbicular or reniform, (3-)5-7(-10) cm × (2.5-)4-6(-8.5) cm, thick and fleshy; flowers .*Flowers in dense verticillasters disposed in terminal spike-like inflorescences, calyx subequally 5-toothed, corolla 8-12 mm long, pinkish-lilac to blue; nutlets .*Nutlets flattened-globose, about 0.7 mm long, smooth, pale brown.  ''P. amboinicus'' occurs on roadsides, waste places and on river banks up to 1500 m altitude.