Introduction of Shi Chang Pu:Grass-leaved Sweetflag Rhizome or Rhizoma Acori Tatarinowii.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Grass-leaved Sweetflag Rhizome, its English name, Latin name, property and flavor, its botanical source one plant species, ①.Acorus tatarinowii Schott., with a detailed introduction to the botanical features of this plant species, the growth characteristics, and ecological environment of this plant species, the features of the herb Grass-leaved Sweetflag Rhizome, its pharmacological actions, medicinal efficacy, and administration guide.

Rhizoma Acori Tatarinowii(Grass-leaved Sweetflag Rhizome).

Rhizoma Acori Tatarinowii:herb photo Pin Yin Name: Shí Chānɡ Pú.
 English Name: Grass-leaved Sweetflag Rhizome.
 Latin Name: Rhizoma Acori Tatarinowii.
 Property and flavor: warm, pungent, bitter.

 Brief introduction: The Herb Rhizoma Acori Tatarinowii is the dried rhizomes of Acorus tatarinowii Schott., used (1).as an aromatic stimulant for treating impaired consciousness, insanity and epilepsy, and (2).to resolve dampness and harmonize the stomach for treating the accumulation of dampness in the middle with anorexia, epigastric stuffiness, and abdominal distension. The herb is commonly known as Rhizoma Acori Tatarinowii, Grass-leaved Sweetflag Rhizome, Grassleaf Sweelflag Rhizome, Rhizome of Grassleaf Sweelflag, Shí Chānɡ Pú.

 Botanical source: Common herbal classics and other famous herbal classics defined the herb Rhizoma Acori Tatarinowii(Grass-leaved Sweetflag Rhizome) as the dried rhizomes of the species (1). Acorus tatarinowii Schott. It is a plant of the Acorus L. genus, the Araceae family (aroid, arum family) of the Arales order. This commonly used species is introduced:

(1).Acorus tatarinowii Schott.

 Acorus tatarinowii Schott.:drawing of plant parts Botanical description: It is commonly known as Shí Chāng Pú. Perennial herbs. Rhizome is aromatic, 2~5 mm thick, outer is pale brown, internodes are 3~5 mm long, root is fleshy, with many fibrous roots, the upper part of rhizome is densely branched, the plant thus into clumps, branches are often fibrous persistent leaf base. Leaves are sessile, leaf blade is thin, base both sides membranous leaf sheath is up to 5 mm wide, upper extension up to middle part of leaf blade, attenuate, deciduous; Leaf blade is dark green, linear, 20~50 cm long, base is recurved, spreading above middle, 7~13 mm wide, apex is gradually narrowed, without midrib, parallel veins are numerous, slightly raised.

 Acorus tatarinowii Schott.:flowering plant Inflorescence stipitate is axillary, 4 ~ 15 cm long, triangular. Leaf bud is 13~25 cm long, 2~5 times or longer for the inflorescence of flesh spike, sparse nearly equal length; Inflorescence is terete, 2.5~8.5 cm long, 4~7 mm thick, upper part is acuminate, upright or slightly curved. Flowers are white.

 Acorus tatarinowii Schott.:plants growing in rivulet Mature inflorescence is 7~8 cm long, up to 1 cm in diameter. Young fruit is green, yellow-green or yellow-white when ripe. Flower period: February to June.

 Ecological Environment: The plant is fond of a wet and gloomy environment, and can grow under dense trees. But not resistant to sun exposure, otherwise the leaves will turn yellow. No tolerance to drought. Slightly hardy, in the Yangtze river basin can be exposed to growth. The plant is commonly found in dense forests with an elevation of 20~2,600 meters above sea level and grows on rocks near streams. The plant is mainly distributed in the south areas of the Yellow River.

 Acorus tatarinowii Schott.:fresh rhizome with plant Growth characteristics: the plant prefers cold and cool humid air, humid environment, cold resistance, avoid drought. It is advisable to cultivate in sandy loam or rich humus loam with bog wetland or convenient irrigation.

 Grass-leaved Sweetflag Rhizome:herb photo Characters of herbs: The herb rhizome is flat cylindrical, slightly curved, and often branched, with a length of 3~20 cm and a diameter of 0.3~1 cm. The surface is brown, reddish-brown, or grayish-yellow, coarse and rough, with many nodes and joints, the length of the internodes is 2~8 mm long; There are slightly flat triangular leaf marks on the upper side, alternately arranged from left to right, there are dot-shaped root marks on the lower side, and sometimes hairy scaly leaf bases remain on the nodes. The texture of the herb is hard and brittle, the fracture surface is fibrous, off-white, or reddish; In the cross-section, the endocortical ring of the fracture surface is obvious, and most vascular bundles and brown oil spots are visible. The herb has an aromatic fragrance, it tastes bitter and slightly pungent. The herb of better grade has thick strips, the fracture surface is white, with a strong fragrance.

 Pharmacological actions: ①.anticonvulsive effect; ②.analgesic effect; ③.tranquilizing effect and soothe the nerves; ④.promote learning and memory, improve memory impairment; ⑤.improve brain norepinephrine and cholinergic nerve function and adjust the level of serotonin in the brain; ⑥.cooling effect; ⑦.spasmolysis; ⑧.antitumor, etc.

 Medicinal efficacy: Inducing resuscitation, reduce phlegm, the intelligence benefit, regulate Qi, promote blood circulation, disperse wind, eliminate dampness, promoting the circulation of Qi, resolving dampness and boost appetite, dispelling wind and arthralgia, relieve swelling and relieve pain. It is indicated for coma and epilepsy (unconsciousness and epilepsy), amnesia (forgettery, poor memory), insomnia (lose sleep), coma of pyrexia (unconsciousness of fever), upset and worry, epilepsy, phlegm syncope, deafness with qi stagnation, tinnitus, deafness, stomachache, abdominal pain, epigastric distended pain, stuffiness and chest congestion, silence, silence with dysentery, wind-cold-dampness arthralgia, carbuncle-abscess and pyogenic infections, scabies, traumatic injury, etc.

 Administration of Rhizoma Acori Tatarinowii (Shí Chānɡ Pú): 
Reference: Administration Guide of Rhizoma Acori Tatarinowii (Shí Chānɡ Pú)
TCM Books: ①.Internally:3~10 grams;②.Internally:water decoction,1~2 qian (about 3~6 grams), fresh herb 3~8 qian(about 9~24 grams);or prepare to pill, powder. Externally:wash with water decoction, or prepare to ground herb powder and apply stick; ③.Internally:water decoction,3~6 grams, fresh herb double dosage (about 6~12 grams), or prepared to pill, powder. Externally:proper amount, wash with water decoction, or prepare to ground herb powder and apply stick.
 Contraindications,Precautions and Adverse Reactions: the herb Rhizoma Acori Tatarinowii should not be combined with all-grass of Canton sonerila, Ma Huang. The herb should not be taken with cerealose(malt sugar), mutton. The herb should not be prepared with ironware.

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