The difference between toad grass and Rehmannia glutinosa
In rural areas, weeds can be seen everywhere, many people think that they are just weeds, but do not realize that some weeds are useful, just like toad grass and Rehmannia glutinosa, can be used as traditional Chinese medicine. The following introduces the difference between toad grass and Rehmannia glutinosa.
Difference 1. Different families and genera
Toad grass, also known as fine seed grass, snow grass and so on, is an annual or biennial herb of the Artemisia family, 10-30 cm high. Rehmannia glutinosa, also known as Radix Rehmanniae, Radix Rehmanniae, etc., is a perennial herb of Scrophulariaceae, up to 30 cm high.
Second, the leaves are different.
The leaves of toad grass are oblong or oblanceolate, green, with slightly wrinkled edges, and both sides are covered with upward strigose or hispidulous hairs. Rehmannia glutinosa leaves ovate to long oval, green above, purplish or purplish red below, margin irregularly crenate or obtusely serrated to teeth, covered with white fine hairs.
Third, the flowers are different.
The flowers of Oviductus Ranae are solitary in leaf axils or subaxillary, and the Corolla is small, blue or light blue, thin white, ambushed or hirsute. Rehmannia glutinosa flowers grow at the top of the stem, or almost all solitary leaf axils, Corolla larger, color outside purplish red, inside yellowish purple, densely covered with multicellular villi and white long hairs.
Fourth, the efficacy is different.
Toad grass can be used as medicine, taste slightly bitter, cool, conducive to dampness detumescence, detoxification and itching effect, often used for eczema, hemorrhoids, anal swelling and pain. The fresh or dried root of Rehmannia glutinosa can be used as medicine, according to the processing method, it can be divided into fresh Rehmannia, dried Rehmannia and cooked Rehmannia, fresh Rehmannia is a medicine for clearing heat and cooling blood, and Radix Rehmanniae is a tonic.
Fresh Rehmannia glutinosa: sweet, bitter, cold in nature, with the effect of clearing away heat and promoting fluid, cooling blood and stopping bleeding. It is used for fever injuring yin, tongue crimson and thirst, warm poison hair spot, hematemesis, bleeding, sore throat.
Dried Rehmannia glutinosa: sweet in taste, cold in nature, with the effect of clearing away heat and cooling blood, nourishing yin and promoting fluid. It is used to warm people's blood, warm toxin and hair spot, hematemesis, haematemesis, fever injury, Yin injury, thirst, constipation, sore throat.
Rehmannia glutinosa: sweet, lukewarm, has the effect of tonifying blood and nourishing yin, tonifying essence and filling marrow, for blood deficiency and yellowing, palpitation, irregular menstruation, bleeding, liver and kidney yin deficiency, sore waist and knees, bone steaming hot flashes, night sweat sequelae, internal heat to eliminate thirst, vertigo, tinnitus, early whitening of mental hair.
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