Introduction of Fu Long Gan:Calcined Yellow Earth or Terra Flava Usta.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Calcined Yellow Earth, its English name, Latin name, property and flavor, its source, ①.calcined yellow earth, with a detailed introduction to the physical features of this processed inorganic substance, the distribution and ecological environment of this substance, the features of the herb Calcined Yellow Earth, its pharmacological actions, medicinal efficacy, and administration guide.

Terra Flava Usta (Calcined Yellow Earth).

four khaki blocks of Terra Flava Usta Pin Yin Name: Fú Lónɡ Gān, or Zào Xīn Tǔ, or Zào Zhōng Huáng Tǔ
 English Name: Calcined Yellow Earth.
 Latin Name: Terra Flava Usta, or Humus Flava Usta.
 Property and flavor: warm nature, tastes pungent.

 Brief introduction: The Herb Terra Flava Usta is clean calcined yellow earth in small lumps, used as (1).an anti-emetic for the treatment of nausea and vomiting due to chronic stomach diseases or pregnancy, (2).an antidiarrhetic for chronic diarrhea, and (3).a hemostatic for bleeding due to failure of the spleen to control the blood. The herb is commonly known as Terra Flava Usta, Calcined Yellow Earth, Fú Lónɡ Gān.

 Source: Herbal classic book defined the herb Terra Flava Usta (Calcined Yellow Earth) as the calcined yellow earth in small lumps burning for a long period by grass fire or firewood. This herb is introduced:

Terra Flava Usta(Calcined Yellow Earth).


 two khaki blocks of Calcined Yellow Earth,and big block and a small block Description: It is also known as humus flava usta, Fú Lónɡ Gān (means Hibernating Dragon Liver), Zào Xīn Tǔ (means stove center earth), or Zào Zhōng Huáng Tǔ (means stove center yellow earth). The clod (earth blocks) in the center of the hearth of the old firewood stove. When disassembling and repairing the wood stove (or the wood kiln), take off the sintered clay blocks and cut off the blackened parts and impurities with a knife.

 Ecological environment: It produces in rural areas all over China.

 several khaki brownish blocks of Calcined Yellow Earth with some powders Characters of herbs: The herb is in irregular blocks of various sizes. The whole herb is orange or reddish-brown. There are knife marks on the surface. The herb is light, its texture is hard, but easily smashed, it has powders that fall off, and can be marked with scratches from nails, the fracture surface is soft and fine, slightly dark, granular, and there are faveolate holes (honeycomb holes). The herb has a smoky smell and mild taste, it has hygroscopicity. The herb of a better grade has big and tidy blocks, is reddish-brown, has honeycomb holes in the broken surface, and has a soft texture.

 Chemical constituents: the herb is mainly composed of silicate acid (H2SiO3), alumina (Al2O3), and iron trioxide (Fe2O3). It also contains sodium oxide (Na2O), potassium oxide (K2O), magnesium oxide (MgO), calcium oxide (CaO), calcium phosphate [Ca3(PO4)2], etc.

 Pharmacological actions: ①.antiemetic effect; ②.effect of astringency and hemostasis (stanch bleeding).

 Medicinal efficacy: Warm the middle energizer and drying dampness, antiemetic effect, hemostasis (stanch bleeding), antidiarrheic (relieve diarrhea). It is indicated for emesia (vomit, throw up) and regurgitation (gastric disorder causing nausea), abdominal pain and diarrhea, hematemesis (spitting blood), hemorrhinia (nose bleeding), hemafecia (hematochezia, passing blood in stool), hematuria (passing blood in urine), hyperemesis gravidarum (hyperemesis during pregnancy; if severe it can result in damage to the brain and liver and kidney), metrorrhagia and metrostaxis, morbid leukorrhea, carbuncle swelling and ulcer sore, etc.

 Administration of Terra Flava Usta (Fú Lónɡ Gān): 
 
Reference: Administration Guide of Terra Flava Usta (Fú Lónɡ Gān)
TCM Books: ①.Internally: water decoction, wrap-boiling, 1~2 liang (about 30~60 grams);or prepare to powder;or boil soup as alternative of water decoction prescription. Externally:prepare to finely ground herb powder, appply stick; ②.Internally:water decoction, 15~30 grams, wrap-boiling,put to deposit and use as water, 60~120 grams; or prepared to powder. Externally:proper amount, prepare to finely ground herb powder, apply stick.

 

 
  

 

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References:
  • 1.Introduction of Fu Long Gan:Calcined Yellow Earth or Terra Flava Usta.

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