The rhizome of Cyperus rotundus L., family Cyperaceae.
Rhizome oblong or cambiform, some slightly curved, 2.0-3.5 cm long, 0.5-1.0
cm in diameter. Surface brown, with longitudinal wrinkles, cortex showing
several nodes attached with many fibers, root scars and bud scars; smooth
and nodes becoming indistinct when the cortex is peeled off. Fracture
surface brown after steamed or cooked, or white when dried; endodermis
rings visible, vascular bundles scattered. Aromatic in odour. Acrid, slightly
bitter and sweet in taste, mild in nature, and attributive to liver and
Disperse the stagnated liver energy, activate vital energy circulation
and alleviate pain, regulate menstruation and prevent miscarriage: For
stagnation of liver energy with distension and pain of the hypochondria
and breast, dysmenorrhea and irregular menstruation, usually used together
with Rhizoma Atractylodis, Rhizoma Ligustici Chuanxiong, Fructus Gardeniae
and Massa Medicata Fermentata (Yueju Pill); for headache due to stagnation
of liver energy; for those complicated by stomach-cold with epigastric
pain, vomiting and acid regurgitation,
usually used together with Rhizoma Alpiniae Officinarum (Pill of Alpiniae
Officinarum and Cyperi); for stagnation of liver energy and stomach energy
with morning sickness and threatened abortion, used together with Caulis
1. Its 5% extract inhibits the uterine contraction in guinea-pigs, rabbits,
cats and dogs in vitro.
3. Promoting the secretion of saliva and gastric juice and expelling flatus.
4. Antipyretic. Its alcoholic extract lowers experimental fever in rats.
5. Slowing heart rate and lowering blood pressure.