Melissa officinalis, known as lemon balm, balm, common balm, or balm mint, is a perennial herbaceous plant in the mint family Lamiaceae, native to south-central Europe, North Africa, the Mediterranean region, and Central Asia.
The fruits are a conical pod with seeds contained in holes in the pod. When the seeds are ripe, they become loose in the pod. The pod then tips down towards the water, releasing the seeds.
It grows-up to a height of 4-6 feet depending on the dept of the swamp or creek it is growing in, maximum spread of 9 inches. It can be grown in a pot. Widely cultivated for its large pink flowers.