Spearmint (Mentha spicata), a member of the Lamiaceae, or mint family, is a plant that mankind has cultivated for thousands of years for its fragrance and medicinal qualities. The plants pictured here were a backyard experiment intended to give my daughter some experience with gardening and the enjoyment of fresh, home grown spices.
Notice the square stem visible in the picture above. This is a characteristic of all the mints.
Caution with Spearmint is required because they readily spread by rhizomes and can spread beyond where you want them. Consequently, most gardeners confine them to containers to prevent their invasion and takeover of the garden.