He Huan Hua (合欢花) — TCM Silk Tree Flower for Emotional Constraint, Insomnia & Depression

At a Glance

Herb: He Huan Hua
Chinese name: 合欢花 (Hé Huān Huā)
Latin name: Albiziae Flos
Nature: Neutral
Taste: Sweet
Meridian: Heart / Liver
Category: Herbs that Calm the Spirit
Introduction: He Huan Hua (合欢花) is the dried flower or flower bud of Albizia julibrissin Durazz. (silk tree), harvested when the characteristic pink powder-puff blossoms are just opening in summer — distinct from He Huan Pi (the bark) though from the same tree. While He Huan Pi is the stronger medicinal with Blood-activating, wound-healing, and more potent constraint-relieving actions, He Huan Hua is the gentler, more food-safe form specifically indicated for chest tightness, emotional frustration, insomnia, and mild depression arising from Liver Qi constraint. Quercetin, isoquercitrin, and flavonoids in the flowers demonstrate anxiolytic, mild sedative, anti-inflammatory, and mood-elevating effects in modern pharmacology; the floral volatile compounds add a subtle aromatherapeutic dimension absent from the bark preparation. He Huan Hua is commonly drunk as a tea for stress-related insomnia and emotional disturbance — its gentle nature, pleasant fragrance, and food-medicine status making it uniquely accessible as a daily wellness remedy.

Relieves Liver Qi constraint — emotional frustration, irritability, depression, chest tightness
Calms the Shen — insomnia, anxiety, restlessness from emotional constraint
Mildly activates Blood — milder than He Huan Pi; suitable for mild Qi-Blood stagnation
Harmonizes the Liver and brightens the emotions — general mood-supporting tonic

Insomnia from Liver Qi constraint with emotional disturbance: primary indication as tea or decoction
Mild depression and persistent low mood from unresolved emotional constraint
Chest tightness and sighing from Liver Qi stagnation: combined with Chai Hu, Bai Shao
Irritability and emotional volatility: combined with Shou Wu Teng and Suan Zao Ren
Stress-related fatigue with insomnia: combined with Ling Zhi and Long Yan Rou as a tonic tea

Dosage: 5–10 g in decoction; 3–5 g as tea
Very gentle and safe — suitable for daily long-term use as a wellness tea
Use with mild caution in pregnancy — gentle Blood-activating properties; generally considered safe at tea doses
Distinguished from He Huan Pi: flower is milder, more aromatic, focused on Liver Qi and emotional wellness; bark is stronger, Blood-activating, wound-healing
May be combined with other flower teas (玫瑰花, 茉莉花, 薰衣草) for synergistic emotional-calming effect

He Huan Hua Tea (合欢花茶) — flower alone steeped in hot water; classic single-herb stress-relief tea
Combined with Mei Gui Hua (玫瑰花) and Fo Shou (佛手) for Liver Qi constraint with emotional frustration
An Shen Bu Xin formulas — He Huan Hua as gentle addition to Shen-calming compound formulas
Combined with Suan Zao Ren, Shou Wu Teng for comprehensive insomnia-anxiety treatment
He Huan Hua vs. He Huan Pi: flower for daily emotional wellness; bark for stronger therapeutic Blood-activating and wound-healing needs

Silk Tree Flower (合欢花) + Flowery Knotweed Stem (首乌藤) + Sour Jujube Seed (酸枣仁) → calms spirit, relieves depression, nourishes blood — standard triad for depression-insomnia from emotional frustration and liver constraint
Silk Tree Flower (合欢花) + Bupleurum (柴胡) + Curcuma Root (郁金) + White Peony Root (白芍) → relieve liver qi constraint, treat depression and anxiety
Silk Tree Flower (合欢花) + Polygala Root (远志) + Acorus Root (石菖蒲) → calm spirit, open orifices, treat phlegm-stagnation with emotional depression
Silk Tree Flower (合欢花) + Lavender (薰衣草) + Rose Flower (玫瑰花) → aromatic spirit-calming blend for anxiety and insomnia
Silk Tree Flower (合欢花) + Flowery Knotweed Stem (夜交藤) + Biota Seed (柏子仁) → nourish heart, calm spirit, relieve depression for chronic insomnia; distinction from Silk Tree Bark (合欢皮) (bark): Silk Tree Flower (合欢花) (flower) is more aromatic — richer in linalool and geraniol; stronger for insomnia and emotional lifting; gentler action; Silk Tree Bark (合欢皮) broader: also promotes fracture healing, disperses abscesses, unblocks blood stasis; flowers used in aromatherapy infusions; dose 5-10g decocted or steeped as tea; sometimes used as dried flower pillow for insomnia

Anxiolytic / sedative
- linalool — rapidly crosses blood-brain barrier
- potent GABA-A positive allosteric modulator
- reduces anxiety in elevated plus-maze
- reduces locomotor activity
- synergizes with pentobarbital sleep
- anti-depressant in FST
- used in clinical aromatherapy for anxiety and insomnia
- geraniol and terpineol add additional sedative-calming effects
Antidepressant
- albizine, tryptamine alkaloids — serotonin system modulation
- MAO-inhibiting activity
- increase brain 5-HT and norepinephrine
- flavonoids — HPA axis normalization
- reduce corticosterone elevation from stress
Anti-inflammatory
- quercetin, rutin — COX-2, 5-LOX inhibition
- reduce airway and CNS inflammation
Antioxidant
- flavonoids — high DPPH scavenging
- protect neurons from oxidative stress
- neuroprotective in glutamate-excitotoxicity models
Mild analgesic
- linalool — inhibit substance P release
- reduce pain sensitization
Antibacterial
- linalool, geraniol — active against skin and respiratory pathogens
comparison: flower > bark for aromatic sedation and emotional lifting; bark > flower for fracture healing and abscess resolution

Shen Nong Ben Cao Jing: ‘(Silk Tree) Primarily calms the five viscera, harmonizes the will of the heart, and makes people joyful and free from worry.’
Ben Cao Gang Mu: ‘Silk Tree Flower… governs depression of the will, unresolvable anxiety and rumination, insomnia and forgetfulness; treats restless heart-spirit and liver qi constraint; benefits the five viscera.’
Yin Pian Xin Can: ‘Silk Tree Flower — sweet and neutral; relieves constraint, harmonizes blood, calms the heart, and disperses abscesses and swelling. Treats insomnia from heart deficiency and aching joints.’
Ben Cao Bian Du: ‘Silk Tree Flower… has functions similar to the bark, but with a lighter, more refined nature; thus it specifically treats depressive insomnia — those who take it are made joyful and free from worry.’