Mesona blume is also called Xianrencao, Xianrendong, Xiancao, and fish yellow grass with pointed calyx. It is a plant of Labiatae, with the lower part of the stem lying on the ground and the upright part, oval or oval leaves, slightly blunt apex, gradually shrinking into a stalk at the base, small serrations at the edge and sparse hairs on both sides; Leaves inserted in the upper part of inflorescence are small, bract-like, oval to inverted triangle, shorter than flowers, often with lavender at the base, and fall off when bearing fruit. Racemes are weak, flowers are small, whorled, calyx is small, bell-shaped, 2-lipped, upper lip is 3-lobed, lower lip is entire, and when bearing fruit, it is tubular, downward curved, with longitudinal veins and transverse wrinkles; Corolla is reddish, upper lip is wide, whole or dentate, lower lip is oval and concave; Stamens 4, filaments prominent; Pistil 1, style 2-lobed; The disk swells on one side. Nutlets oval, flowering in late autumn.

Growth habit: I like warm and humid climate. When the temperature reaches above 20℃ on that day, it grows vigorously; when the average daily temperature is below 15℃, it grows slowly; when it is below 10℃, it is difficult to grow; when it is below 0℃, the overground part dies and overwinters with perennial roots. Avoid drought and stagnant water. During the growth and development, abundant rain can often achieve high yield, but if soaked in stagnant water for more than 2 days, it will cause root rot. It is shade-tolerant, and grows well in the light environment with sunshine time less than 8 hours. The requirements for soil conditions are not strict, but it is better to use deep, fertile, loose, moist sandy loam rich in humus, and the plants growing in arid and barren soil are short and slow.