Mary Rhododendron Leaf and Twig

Traditional Use

Primary Actions

• Transforms phlegm and stops cough - Zi Hua Du Juan is used for chronic cough with sputum, lingering bronchitic irritation, and chest oppression from retained phlegm.
• Descends qi and relieves wheezing - traditional use includes dyspnea and asthma-like breathing difficulty when phlegm blocks the Lung.
• Supports treatment of chronic bronchitis patterns - modern Chinese materia medica summaries often preserve this as the herb's main practical indication.

Secondary Actions

• Despite the historical slug, the medicinal is a leaf-and-twig drug rather than the ornamental flower itself, so source identity matters.
• It is more phlegm-cough oriented than many better-known rhododendron species and is commonly used in proprietary respiratory preparations.

Classic Formulas

• Zi Hua Du Juan with Pi Pa Ye and Jie Geng - common pairing logic for chronic phlegm-cough with irritated bronchi.
• Zi Hua Du Juan with Xing Ren and Sang Bai Pi - descending-Lung combination for cough, wheezing, and sticky sputum.
• Proprietary chronic-bronchitis capsules and decoctions - more characteristic of this herb than famous pan-classical formulas.

Classical References

• Modern Chinese herbal summaries describe Zi Hua Du Juan as slightly acrid and slightly warm, entering the Lung to transform phlegm, stop cough, and calm wheezing.
• Its best-established traditional territory is chronic bronchitis and phlegm-obstructed Lung qi rather than broad anti-toxic or gynecologic use.
• Because the medicinal part is leaf and twig, not showy ornamental flower, trade identification is more important than the slug implies.