1、 Stem stem difference

The stem of Lianqian grass is square, slender and often twisted, grayish green or slightly purple, with short villi, and the middle of the stem is empty

The stem of Lysimachia christinae is slender and twisted. There is no villus on the surface. The diameter is between 0.2 and 0.4 cm. The surface is brown or dark brownish red with longitudinal lines

2、 Leaf difference

The leaves of lianqiancao are opposite, and most of the leaves are wrinkled. After flattening, the leaves are kidney shaped or close to heart-shaped. The edge of the leaves has round blunt teeth, grayish green or greenish brown, and the petiole is slender

The leaves of Lysimachia christinae are opposite. The leaves are round, oval or nearly round, green, with a length of 2 to 6 cm and a width of 1 to 4 cm. The apex of the leaves is blunt to round, and the base is truncated to shallow heart-shaped, slightly fleshy