He Huan Hua (Mimosa Tree Flower)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of He Huan Hua?

  Roughly 4.5–10 g in decoction. Reference materia medica sources give ranges of 4.5–9 g and 5–10 g, which agree closely once rounded to whole grams; some sources describe use up to ~15 g for stronger or more acute emotional constraint.

  Source: multiple online sources. Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions or contraindications for He Huan Hua?

  He Huan Hua is generally well tolerated, and the reviewed materia medica references list no specific named contraindication. As with other qi-moving, Liver-soothing herbs, caution in pregnancy is prudent. (Flagged for practitioner confirmation.)

  Source: multiple online sources (no specific contraindication named in any of the three).

Chinese Herb Toxicity & Overdose

• Low. No significant toxicity is reported for the flower at normal therapeutic doses in the reviewed materia medica or research literature. The animal studies used to investigate its sedative/hypnotic and memory effects (below) did not report adverse or toxic effects at the doses tested, though these were pharmacology studies, not formal toxicology studies. (Note the part distinction: He Huan Hua is the flower of the silk tree, Albizia julibrissin; He Huan Pi is the bark of the same tree.)

  Source: materia medica consensus; no toxicity signal in the reviewed preclinical research (below). Research context, not a therapeutic claim.

Herb-Drug Interactions

• No well-established clinical herb–drug interactions are documented. Preclinical research below found that a Flos Albiziae extract and its flavonoid quercetin potentiated the hypnotic effect of the sedative pentobarbital in mice via the serotonergic system. This suggests theoretical additive effects with sedatives, hypnotics, antidepressants, or anxiolytic medications are plausible, though this has not been studied clinically. (Flagged for practitioner confirmation — absence of documented clinical interactions is not proof of safety.)

Western / Biomedical Research

Chinese Herb Clinical Studies & Research

Provided as research context — a summary of published biomedical study, not a therapeutic or medical claim.

• Is there modern research on He Huan Hua (Flos Albiziae)?

  Yes — entirely preclinical (animal and insect models), and it converges on the same sedative, anxiolytic, and pro-memory picture as the traditional use. The flowers’ characteristic flavonoids — quercetin, quercitrin, and isoquercitrin — are the most consistently studied active constituents.

  • Sedative activity (flower-derived flavonoids) — quercitrin and isoquercitrin, isolated directly from Albizia julibrissin flowers, dose-dependently increased pentobarbital-induced sleeping time in mice, supporting the traditional use of the flower as a sedative (Kang et al., Journal of Ethnopharmacology, 2000).
  • Hypnotic mechanism — a Flos Albiziae aqueous extract and its constituent quercetin potentiated pentobarbital’s hypnotic effect (longer sleep duration, shorter sleep onset) in mice in a dose-dependent way, with evidence pointing to the serotonergic system as the mechanism.
  • Memory / insomnia (whole-flower extract) — in fruit flies (Drosophila), an Albizia julibrissin flower extract rescued memory impairment caused by sleep deprivation at the higher of two doses tested; the authors note the herb is reportedly the most commonly prescribed Chinese herbal medicine for insomnia in clinical practice in Taiwan.
  • Anxiolytic activity (isolated flavonoid) — quercitrin, described as a characteristic flavonoid of Flos Albiziae, showed anxiolytic-like effects in mice (elevated plus maze, light/dark box, marble-burying tests) mediated by 5-HT1A serotonin receptors; this tested the purified compound, not the whole flower.

  All of the above is animal/insect-model research; no human clinical trials of He Huan Hua or Flos Albiziae were located.

  Sources: PMID 10904180 (Journal of Ethnopharmacology, 2000; flavonol glycosides isolated from the flowers, sedative activity in mice); PMID 26623026, PMC 4660601 (Flos Albiziae extract & quercetin, hypnotic potentiation via the serotonergic system, mice); PMID 31057652, PMC 6463593 (Albizia julibrissin flower extract, memory rescue after sleep deprivation, Drosophila); PMID 27298626 (quercitrin, anxiolytic via 5-HT1A receptors, mice). Research context, not a therapeutic claim.

Chinese Herb Notes

• How is He Huan Hua different from He Huan Pi and other calm-spirit herbs?

  He Huan Hua is the flower of the same silk tree as He Huan Pi (the bark); both calm the spirit, but the flower’s emphasis is on soothing the Liver and moving constrained qi for emotional depression and anxiety, while the bark adds a blood-invigorating, swelling-reducing action used for traumatic injury. Both are gentle herbs generally taken over a longer course rather than for quick effect.

  How it differs from its neighbors:

  • vs He Huan Pi — same plant (Albizia julibrissin): Hua is the flower, Pi the bark. The flower leans more toward relieving Liver-qi constraint and lifting mood; the bark’s additional blood-invigorating action makes it the better choice for traumatic injury, swelling, and sores.
  • vs Ye Jiao Teng — He Huan Hua suits insomnia from emotional/qi constraint, whereas Ye Jiao Teng suits insomnia from blood deficiency.
  • vs Suan Zao Ren — Suan Zao Ren nourishes Heart and Liver blood/yin for deficiency-type insomnia (often with sweating); He Huan Hua works more by unblocking constrained qi and mood rather than tonifying.

  Common combinations: with He Huan Pi or Ye Jiao Teng for constraint-related insomnia; with other Liver-qi-regulating herbs for emotional depression and irritability from qi constraint. (Traditional formula context, not treatment advice.)

  Source: this site’s He Huan Pi monograph (flower-vs-bark differentiation); materia medica summaries cross-referenced against multiple online sources.