1、 Blade difference

The leaf of Melissa officinalis is oval, and the one growing on the stem is generally 5cm long and about 3-4cm wide. The one on the branch is relatively small, 1-3cm long and about 0.8-2cm wide. The apex is blunt or acute, the base is round and then subcordate, and the edge is serrated, nearly membranous or herbaceous, with longer pilose

Mint leaves are oblong lanceolate, elliptic or ovate lanceolate, rarely oblong, with sharp apex, wedge-shaped to nearly circular base, and thick toothed serrations on the edge. Compared with the former, the pilose hair is short and not obvious

2、 The difference between flowers

The corymbose of Melissa is leafy, but much smaller than the leaf. The calyx is bell shaped and the Corolla is milky white

Peppermint cymes are axillary, spherical in outline, with thin pedicels, tubular bell shaped calyx, lavender corolla color and pilose outer layer