Macrostem onion (Xiebai)
Pharmaceutical Name: Bulbus Allii macrostemi
Botanical Name: Allium macrostemon Bge.
Common Name: Macrostem onion, Bakeri, Bulb of Chinese chive
Source of Earliest Record: Shennong Bencao Jing
Part Used: The macrostem, or bulb, of the onion is dug in May, cleaned and dried in the sun.
Natural Properties & Taste: Pungent, bitter and warm
Meridians: Lung, stomach and large intestine
1. To promote the flow of yang and dissipate cold phlegm.
2. To regulate qi and reduce stagnation.
1. Cold phlegm stagnated in the chest manifested as stifling sensation and pain in the chest and dyspnea. Macrostem onion (Xiebai) is used with Trichosanthes fruit (Gualou) in the formula Gualou Xiebai Baijiu Tang.
2. Dysentery manifested as tenesmus. Macrostem onion (Xiebai) is used with Immature bitter orange (Zhishi), Costus root (Muxiang) and White peony root (Baishao).
Dosage: 5-10 g