1、 Leaf difference

The leaves of Trifolium pratense have palmately three compound leaves, the stipules are ovate lanceolate, membranous, the base holds the stem in a sheath shape, and the free part is sharp; Its petiole is relatively long, 10 to 30 cm long. The leaflets are obovate or nearly circular, 8 to 20 mm long and 8 to 16 mm wide. The apex of the leaves is blunt or concave, and the base is wedge-shaped, gradually narrowing to the petiole

The leaves of Oxalis sorrel are basal or alternate on the stem. The stipules are very small, oblong or oval. The edges of the leaves are densely villous. The base is connate with the petiole, with 3 leaflets. The leaflets are inverted heart-shaped and sessile

2、 Flower difference

The flowers of Trifolium pratense are spherical, terminal, straight about 15 to 40 mm, with 20 to 50 flowers, lanceolate flower bracts, white, milky yellow or light red corolla, with aroma

The flowers of Oxalis sorrel are solitary or several, gathered into umbels, axillary, the total pedicel is light red, and the petals are 5, yellow, oblong and obovate