
Allium macrostemon
Also known as long-stamen chive, Chinese wild onion, xie bai, xiè bái.
Xie bai is the dried bulb of Allium macrostemon, a small wild onion of grassland, field margins and hillsides across China, Korea, Japan and the Russian Far East; the cultivated Allium chinense is an accepted alternative source. The small white bulbs are gathered in early summer, scalded briefly and dried. In Chinese medicine xie bai is the classic herb for chest bi, the painful obstruction of the chest described in the Han dynasty formularies, where it is paired with gua lou and wine to open yang and scatter phlegm-cold. It also carries qi downward through the gut, which is why it appears in remedies for dysentery with tenesmus.

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Ask HerbertChest tightness and pain that worsens in cold weather and after rich food, with a pale tongue, a thick white greasy coat and shortness of breath, easing with warmth
Diarrhea or dysentery with straining and a sense of incomplete evacuation in a cold, sluggish digestion
The record lists 7 contraindications; open the plate in the library to read them in full.
Xie bai belongs in the formula when chest yang is blocked: a cold, tight, heavy chest with pain that may reach the shoulder or back, breathlessness, a pale tongue with a white greasy coat, and a picture that worsens with cold and eases with warmth.
Temperature: warm. Taste: acrid, bitter. Channels: Heart, Lung, Stomach, Large Intestine. Actions: Unblocks yang qi and disperses knotted constraint in the chest; Moves qi and breaks up cold-phlegm obstruction; Directs qi downward and relieves tenesmus and distension.
| Preparation | As written | Metric |
|---|---|---|
| Decoction | 5-10 g dried bulb daily | 5000-10000 mg |
| Powder | 1-3 g twice daily | 1000-3000 mg |
| Tincture (1:5, 45%) | 2-4 mL three times daily | 2-4 mL |
Doses are reproduced from the sources for practitioners and are not a recommendation for any person.
Overview. Xie bai is the dried bulb of Allium macrostemon, a small wild onion of grassland, field margins and hillsides across China, Korea, Japan and the Russian Far East; the cultivated Allium chinense is an accepted alternative source. The small white bulbs are gathered in early summer, scalded briefly and dried. In Chinese medicine xie bai is the classic herb for chest bi, the painful obstruction of the chest described in the Han dynasty formularies, where it is paired with gua lou and wine to open yang and scatter phlegm-cold. It also carries qi downward through the gut, which is why it appears in remedies for dysentery with tenesmus.
Clinical Notes. Xie bai belongs in the formula when chest yang is blocked: a cold, tight, heavy chest with pain that may reach the shoulder or back, breathlessness, a pale tongue with a white greasy coat, and a picture that worsens with cold and eases with warmth.
Chinese Medicine Profile. Temperature: warm. Taste: acrid, bitter. Channels: Heart, Lung, Stomach, Large Intestine. Actions: Unblocks yang qi and disperses knotted constraint in the chest; Moves qi and breaks up cold-phlegm obstruction; Directs qi downward and relieves tenesmus and distension.
Long-stamen onion stands in 7 documented formulas in the library, among them zhi shí xiè bát gui zhi tàng, lou xiè liu rén tāng, gua lóu xìe bái bái jĩu tāng, gua lou xie bát bàn xia táng.

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