Leonurus japonicus, commonly called Chinese motherwort, is a herbaceous flowering plant

Flowering plant

The flowering plants , also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by a series of synapomorphies...

 native to Asia, including Korea

Korea

Korea ) is an East Asian geographic region that is currently divided into two separate sovereign states — North Korea and South Korea. Located on the Korean Peninsula, Korea is bordered by the People's Republic of China to the northwest, Russia to the northeast, and is separated from Japan to the...

 and Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

, and China to Cambodia

Cambodia

Cambodia , officially known as the Kingdom of Cambodia, is a country located in the southern portion of the Indochina Peninsula in Southeast Asia...

.

Description

Plants are annual or biennial, growing from taproots. The stems are upright growing to a height of 30 to 120 cm. The flowers are sessile and produced in verticillasters. The calyx is tubular-campanulate shaped and 6-8 mm long with broad triangle shaped teeth. The corolla is white or reddish to purplish red in color. Plants bloom from June to September.

It has escaped cultivation and become naturalized in other parts of the world including South and North America, Europe and Africa.

Uses

It is one of the 50 fundamental herbs used in traditional Chinese medicine

Traditional Chinese medicine

Traditional Chinese Medicine refers to a broad range of medicine practices sharing common theoretical concepts which have been developed in China and are based on a tradition of more than 2,000 years, including various forms of herbal medicine, acupuncture, massage , exercise , and dietary therapy...

, where it is called yìmǔcǎo , literally "beneficial herb for mothers".

In China Leonurus heterophyllus injection has been used for preventing postpartum hemorrhage after caesarian section.

Health claims

Functions:
Smooth menses;
Regulate menses;
Invigorate blood circulation;
Move blood;
Reduce masses;
Promote urination;
Reduce swelling;
Disperse phlegm;
Disperse edema.

Indication:
Menstrual disorders, delayed or absent menses, irregular menses, amenorrhea, dysmenorrha, endometriosis

Endometriosis

Endometriosis is a gynecological medical condition in which cells from the lining of the uterus appear and flourish outside the uterine cavity, most commonly on the ovaries. The uterine cavity is lined by endometrial cells, which are under the influence of female hormones...

, infertility, PMS, lower abdominal pain, placenta leakage, dystocia

Dystocia

Dystocia is an abnormal or difficult childbirth or labour. Approximately one fifth of human labours have dystocia.Dystocia may arise due to incoordinate uterine activity, abnormal fetal lie or presentation, absolute or relative cephalopelvic disproportion, or a massive fetal tumor such as a...

, retained placenta, postpartum abdominal pain due to blood obstruction, postpartum pain and bleeding, hematuria

Hematuria

In medicine, hematuria, or haematuria, is the presence of red blood cells in the urine. It may be idiopathic and/or benign, or it can be a sign that there is a kidney stone or a tumor in the urinary tract , ranging from trivial to lethal...

, hypertension, nephritis

Nephritis

Nephritis is inflammation of the nephrons in the kidneys. The word "nephritis" was imported from Latin, which took it from Greek: νεφρίτιδα. The word comes from the Greek νεφρός - nephro- meaning "of the kidney" and -itis meaning "inflammation"....

, kidney stones, edema

Edema

Edema or oedema ; both words from the Greek , oídēma "swelling"), formerly known as dropsy or hydropsy, is an abnormal accumulation of fluid beneath the skin or in one or more cavities of the body that produces swelling...

, dysuria, hematuria (blood in urine), lump in the breast, skin infections, skin eruptions.

The leaves are diuretic

Diuretic

A diuretic provides a means of forced diuresis which elevates the rate of urination. There are several categories of diuretics. All diuretics increase the excretion of water from bodies, although each class does so in a distinct way.- Medical uses :...

 and are placed in bath water to relieve itching and painful shingles.

The dried flowers are emmenagogue

Emmenagogue

Emmenagogues are herbs which stimulate blood flow in the pelvic area and uterus; some stimulate menstruation. Women have used plants such as mugwort, parsley and ginger to prevent or terminate early pregnancy...

 and are also used in pregnancy and to help expel the placenta after giving birth.

The juice of the stems is vulnerary.

The fruit is antibacterial, diuretic, emmenagogue, hypotensive, ophthalmic and vasodilator. It is used in the treatment of abnormal menstruation, nebula and conjunctivitis

Conjunctivitis

Conjunctivitis refers to inflammation of the conjunctiva...

.

The seed is aphrodisiac, diuretic, emmenagogue, ophthalmic and is also used in the treatment of various women's complaints. The plant was ranked number one in a survey of 250 potential antifertility plants in China. The seed is used in the treatment of conjunctivitis and night blindness.

The aerial parts of the plant are alterative, antibacterial, antifungal

Antifungal

* Antifungal medication, a medication used to treat fungal infection s such as athlete's foot , ringworm, candidiasis, etc.* Antifungal protein, a protein family* an adjective referring to a fungicide compound...

, depurative, diuretic, emmenagogue, hypotensive, vasodilator and vulnerary.

The whole plant is decocted, either on its own or with other herbs, as an ophthalmic. It is used in the treatment of abnormal menstruation, postpartum abdominal pain, tumours, uterine bleeding, oedema, eczema

Eczema

Eczema is a form of dermatitis, or inflammation of the epidermis . In England, an estimated 5.7 million or about one in every nine people have been diagnosed with the disease by a clinician at some point in their lives.The term eczema is broadly applied to a range of persistent skin conditions...

and purulent abscess. It is also used externally as a poultice for bruises.

External links

• USDA GRIN Taxonomy for Plants - Leonurus japonicus