半夏为天南星科多年生草本植物，别名半子、三兴草、三片叶。性味辛，温、有毒。燥湿化痰，和胃健脾，降逆止呕之功效。主治痰湿水饮，胸膈胀满，头痛失眠等症。此药在我省分布于天水、陇南、平凉等地。我省大部分地区均可栽培。现将其丰产栽培技术介绍如下： 1 形态特征 多年 Pinellia ternate asparagus perennial herb, alias half son, Sam Hing grass, three leaves. Taste Xin, warm, toxic. Dampness and phlegm, stomach and spleen, Jiangni vomiting effect. Indications Phlegm water drink, chest diaphragmatic fullness, headache insomnia embolism. This medicine is distributed in our province in Tianshui, Longnan, Pingliang and other places. Most parts of our province can be cultivated. Now its high yield cultivation techniques are as follows: 1 morphological characteristics for many years