In China,Spreading Hedyotis Herb Extract, this raw materials is distributed in Yunnan, Guangdong, Guangxi, Fujian, Zhejiang, Jiangsu, Anhui; and the crude drug is mainly produced in Fujian, Guangdong, Guangxi, Yunnan, Zhejiang, Jiangsu and Anhui. and Khon Kaen in Thailand.
This species is an annual herb. The root is slender, branched and white. The stem is somewhat square or flat-cylindrical, with divergent branches produced from the base. The leaves are opposite; the blade is linear to linearly lanceolate, 1-3.5cm long, 1-3mm wide, acute apically; the stipule is membranous, sheathlike at the base, awned at the tip. The flowers occur solitarily or in pairs from leaf axils; the calyx tube is spherical and 4-divied, the lobes being oblong-lanceolate and marginally ciliate; the corolla is white, funnel-shaped and 4-partite at the top, with ovally oblong lobes; each flower has 4 stamens located at the throat of the corolla tube which are alternate with the petals; the stigma is round and 2-lobed. The fruit is a capsule, flattened-globate, with a persistent calyx. The seed is brownish yellow, tiny, and 3-ridged.
1. Applied in pharmaceutical field, because of the function of inhibition and paralysis to sensory nerve endings, it can be used as counter irritant;
2. Applied in food field, often used as additives, with distinct fragrance smell, it can promote digestion and increase appetite;
3. Applied in daily necessities field, aslo added into a large amount of oral cleaning products,such as dentifrices, mouthwash and tooth powder.