Bencao Gangmu Reference Library
望江南 / 咖啡决明 / 羊角豆 / 野决明 / 假绿豆 / 狗屎豆 — Senna occidentalis (L.) Link (syn. Cassia occidentalis)
Pinyin: Wàngjiāngnán / Kāfēi Juémíng / Yángjiǎodòu · Malay: Gelanggang Kecil / Kacang Kota / Kopi Senna / Petai Belalang · Family: Fabaceae (豆科 / 云实亚科)
Energetics
Cool to Cold (微寒 / 苦寒; Roasted seeds are warm-nutty / 甘温焦香)
Flavor
Bitter, sweet, slightly pungent; deeply nutty and fragrant when roasted (苦、甘、微辛、平、微寒、炒后浓郁焦香)
Meridians
Liver (肝), Stomach (胃), Lung (肺), Large Intestine (大肠)
Traditional Edict
Coffee Senna (Gelenggang Kecil / Wang Jiang Nan / Kopi Senna). Petiole with dark purple basal gland and sickle-curved pods. Roasted seeds brew into a rich caffeine-free coffee: subdues hypertensive dizziness, soothes chronic stomach pain, clears liver fire.
Cautions & Contraindications
- Ensure seeds are mature and thoroughly roasted for coffee use. High safety profile in human dietary roasted coffee. Contraindicated during pregnancy in high-dose laxative decoctions.
Clinical Applications
- Stage 1 essential hypertension with tension headaches and dizziness, functional dyspepsia with acid regurgitation, chronic superficial gastritis, and caffeine-free lifestyle beverage for cardiac patients.
Quality Markers
Mechanism & Phytochemistry
1. Emodin and physcion stimulate endothelial eNOS and inhibit L-type calcium channels, reducing peripheral vascular resistance and blood pressure. 2. Tannins in roasted seeds buffer gastric acid. 3. Zero caffeine content.
Preparation & Dosage
THE SOVEREIGN KOPI SENNA CAFFEINE-FREE LIVER-TONIC BREW: 50 g dry seeds roasted in dry skillet for 10 min until dark chocolate-brown and puffed (Chao Wang Jiang Nan); ground and brewed (10 g in 250 mL boiling water in French press) as morning coffee. Decoct: 6-12 g.
Appended Prescriptions
- 1. The Sovereign Liver-Fire Hypertension Suite with Prunella vulgaris (Xia Ku Cao) and Chrysanthemum. 2. Gastric Acidity & Dyspeptic Harmony Tea with Citrus reticulata (Chen Pi).
Yemama Apothecary · Petaling Jaya, Malaysia · For educational and clinical reference only
