The rhizome of Alpinia officinarum Hance, family Zingiberaceae.
Rhizome ramified-terete and curved, 5-9 cm long, 1.0-1.5 cm in diameter.
Epidermis brown-red, with wavy ringed nodes; intemodes 0.5-1.0 cm long,
with root scars under the node. Section grey-brown, fibrous, stele being
one third of the section. Aromatic in odour. Acrid in taste, heat in nature,
and attributive to spleen and stomach channels.
cold and warm the middle jiao, alleviate pain and relieve vomiting: For
deficiency-cold of the middle jiao with cold pain in the abdomen and vomiting.
2. Its 0.25~0.75% decoction stimulates while 1.0-1.25% decoction inhibits
the intestinal peristalsis of guinea pigs in vitro.