1, with different morphological characteristics: oregano leaves are perennial herbs of Labiatae, and the whole plant smells fragrant, and it is also called Pistacia, Mint and Euler Gang; It is a smooth plant of the genus Parsley in Umbelliferae. Roots spindle-shaped, sometimes thick. The stems are round and slightly ribbed, and the height can reach 100 cm. The leaves are dark green and the surface is bright. The basal leaves and lower leaves of the stem have long stalks, the lobes are needle-shaped and linear, and the umbels are smooth. Involucral bracts linear, sharp and leathery; Umbellies have flowers, small involucres are linear or linear subulate, and fruits are oval and grayish brown, which bloom in June and bear fruit in July.

2, different growth habits: oregano leaves, also known as dysentery grass, perilla frutescens, mint, belong to the genus Oregano in Labiatae. It generally grows on hillsides, roadsides, shrubs, grasslands or forests at an altitude of 500-3600 meters; Coriander likes cold climate, cold-resistant, but not heat-resistant, and likes humidity. It is suitable to grow in sandy land with fertile soil, strong water retention and rich organic matter, but water accumulation should be avoided. The edible organs of parsley are mainly fresh leaves and petioles.

3. Different functions: oregano leaves can be used as medicine. In Chinese medicine, oregano leaves are pungent, cool and non-toxic. They have the effects of clearing away heat and relieving exterior syndrome, regulating qi and eliminating dampness, and can also be used as spices. Coriander essential oil contains flavonoids, which have diuretic and bactericidal effects. Chewing its leaves can eliminate oral odor and is a natural deodorant. This is the difference between oregano leaves and parsley.