Round leaf Mint stem erect, about 30 to 80 cm tall, obtuse quadrangular, stem with stripes.
The stem of peppermint is erect, about 30 to 60 cm high, with sharp quadrangular shape and four grooves.
The leaves of peppermint are usually sessile, round, ovate or oblong ovate, 2 to 4.5cm in length, 1.5cm to 3cm in width, blunt at the apex, heart-shaped at the base of the leaf, with round teeth or round teeth at the edge, paper-shaped, green above the leaf, light green below, and soft hair.
Mint leaves are long, round, lanceolate, oval, lanceolate or oval, about 3 to 5 cm long and 0.8 to 3 cm wide, with sharp front end, wedge-shaped or nearly round leaf base, toothlike serrations on the edge of the leaf, and green leaf color.
Round leaf Mint cymes aggregate into cylindrical spikes at the top of stems and branches. The inflorescences are 2 to 4 cm long and about 6 mm in diameter. The Corolla is white, light blue, purple or lavender.
Umbels of mint whorls, nearly globose in outline, ca. 18 mm in diam. Flowers are usually white
