Introduction of Lu Gen:Reed Rhizome or Rhizoma Phragmitis.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Reed Rhizome, its English name, Latin name, property and flavor, its botanical source one plant species, ①.Phragmites communis Trin., 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 Reed Rhizome, its pharmacological actions, medicinal efficacy, and administration guide.

Rhizoma Phragmitis(Reed Rhizome).

Phragmites communis:drawing of plant and herb Pin Yin Name: Lú Gēn.
 English Name: Reed Rhizome.
 Latin Name: Rhizoma Phragmitis.
 Property and flavor: cold, sweet.

 Brief introduction: The herb Rhizoma Phragmitis is the fresh or dried rhizome of Phragmites communis(L.) Trin.(family Gramineae), used (1).to clear heat and promote fluid production in cases of high fever with thirst, (2).to evacuate pus for treating lung abscess, and (3).to arrest vomiting in cases of stomach heat. The herb is commonly known as Rhizoma Phragmitis, Reed Rhizome, or Lú Gēn.

 Botanical source: The herb Rhizoma Phragmitis(Reed Rhizome) is the fresh or dried rhizome of Phragmites communis Trin., it is a plant of the Phragmites Adans. Genus, the Gramineae family of the Poales order.

 Phragmites communis:growing plant Common official herbal classics and Other famous herbal classics defined the herb Rhizoma Phragmitis(Reed Rhizome) as the fresh or dried rhizome of (1). Phragmites communis Trin. This commonly used species is introduced as:

(1).Phragmites communis Trin.

 Botanical description: It is commonly known as reed, perennial tall herb, 1~3 meters tall. Underground stem is thick, crosswalklk, hollow, there are shoots on the section. Stem erect, hollow. Leaves are in 2 rows, alternate; Leaf-sheath cylindric, leaf tongue hairy; Leaf blade flat, 15~45 cm long, 1~3.5 cm wide, margin rough. Spikes arranged into large panicles, terminal, 20~40 cm long, slightly pendulous, lower pedicel with white pilose; Spikelets usually have 4~7 flowers, 10~16 cm long; The first flower is usually male, the glume lanceolate, unequal, the first glume half or less of the second glume; Lemma longer than palea, smooth spreading; Bisexual flowers, 3 stamens, 1 pistil, 2 styles, stigma feathery. Caryopsis elliptic, separated from palea. Its flowering and fruiting period is from July to October.

 Phragmites communis:plant with rhizome is dig out Ecological environment: The plant grows in shallow water on the banks of rivers and ponds. Resource distribution: The plant distributes in most areas of China.

 Growth characteristics: The reed grows in shallow water on the banks of rivers and ponds. It prefers a warm and humid climate, cold resistance. It is advisable to select a deep soil layer and rich humus in rivers and shallow water along the bank of pond and marsh.

 Reed Rhizome:herb photo Characters of herbs: Fresh Reed Rhizome: the herb is long cylindrical, some are slightly flat, varying in length, 1~2 cm in diameter. The surface is yellowish white, shiny, and the cortex is loose and peelable. Nodes are annular, with residual roots and bud marks. The texture of the herb is light, tough, not easily broken. The fracture surface is yellowish white, hollow, the thickness of wall is 1~2 mm and small holes arranged in a ring. The herb is odorless and sweet. The herb which has a thick and uniform stripe, yellow and white color, luster and no fibrous root is better.

 Dry Reed Rhizome: the herb is a long, flattened cylinder. The surface is shiny, yellow and white. The joints are hard, red and yellow, and there are longitudinal wrinkles between the joints. The texture of the herb is light, soft and tough. The herb is odorless, it tastes slightly sweet. The herb which has a thick and uniform stripe, yellow and white color, luster and no fibrous root is better.

 Pharmacological actions: ①.antipyretic; ②.antiemetic effect; ③.make blood sugar drop slightly; ④.inhibit heart contraction; ⑤.antibacterial; ⑥.dissolving gallstones effect.

 Medicinal efficacy: Clear heat and promote the secretion of saliva or body fluid, relieving restlessness, antiemetic(preventing or arresting vomiting), diuresis, promoting eruption. It is indicated for fever and polydipsia, stomach heat and nausea, choke, regurgitation, cough with lung heat, lung abscess vomiting pus, atrophic lung disease, lung abscess, pyretic stranguria, measles. And it can be used to detoxify puffer fish poison.

 Administration of Rhizoma Phragmitis(Lú Gēn): 
Reference: Administration Guide of Rhizoma Phragmitis(Lú Gēn)
TCM Books: ①.Internally:15~30 grams, fresh herb double dosage, or extract juice;②.Internally:water decoction, 0.5~1 liang(about 15~30 grams), fresh herb 2~4 liang(about 60~120 grams), or extract juice;③.Internally:water decoction, 15~30 grams, fresh herb 60~120 grams, or fresh herb extract juice. Externally:proper amount, wash with water decoction.

Herbs Clearing Heat and Purging Fire.

 Introduction: Herbs Clearing Heat and Purging Fire: an agent or substance that has the effect of clearing heat from the Qi system, with high fever, dire thirst, dry yellow tongue coating and rapid surging pulse, or purging fire from the internal viscera, such as heart fire, liver fire, etc.

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