Long-stamen onion (Allium macrostemon)
Allium macrostemon
Chinese Herbalism
Chinese Herbalism

Long-stamen onion

Allium macrostemon

Also known as long-stamen chive, Chinese wild onion, xie bai, xiè bái.

WarmingDryingTaste: PungentTaste: Bitter

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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Actions

Chest-opening cardiac remedy (traditional)AntiplateletCoronary protectiveCarminativeAntispasmodicExpectorantLipid-loweringAntimicrobialAntioxidant

Indications what the tradition reached for it in

Specific indications

Chest 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

Safety

The record lists 7 contraindications; open the plate in the library to read them in full.

In practice

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.

In Chinese medicine

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.

Dosing as the sources wrote it

PreparationAs writtenMetric
Decoction5-10 g dried bulb daily5000-10000 mg
Powder1-3 g twice daily1000-3000 mg
Tincture (1:5, 45%)2-4 mL three times daily2-4 mL

Doses are reproduced from the sources for practitioners and are not a recommendation for any person.

From the sources

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.

In formulas

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.

Often paired with

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