
Ceanothus thrysiflorus
Also known as California Lilac, Deer Bush, Blueblossom, Blue Myrtle Brush.
Ceanothus thyrsiflorus, known as California lilac or blueblossom, is a evergreen shrub native to coastal California and Oregon, valued in the mountain chaparral for its dense clusters of blue flowers. Eclectic physicians of the nineteenth century used the leaf, berry, and root bark, most often as a tincture, for congestive conditions of the throat, spleen, and lymphatic system. It stands alongside its better documented relative Ceanothus americanus in the same tradition of astringent, decongestant shrubs used for boggy mucous membranes and sluggish lymphatic drainage.

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Ask HerbertSore, constricted throat with thick, tenacious discharge and pain on swallowing
Profuse, thick nasal or throat catarrh where the membrane needs clearing and drying
Boggy, congested spleen with a sense of fullness in the left upper abdomen
The record lists 4 contraindications; open the plate in the library to read them in full.
This is a plant reached for when tissue is congested, boggy, and discharging thick or tenacious mucus rather than thin catarrh. The classic picture from the old eclectic literature is a sore, constricted throat with real difficulty swallowing and a feeling of dryness underneath the discharge, seen in pharyngitis, tonsillitis, and the catarrhal states that follow a cold settling in the throat.
| Preparation | As written | Metric |
|---|---|---|
| Tincture (1:5, 50%) | 1-3 mL three times daily | 1-3 mL |
| Gargle dilution | 5 mL tincture diluted in 100 mL water, used as a throat gargle several times daily | 5-5 mL |
| Leaf infusion (topical eyewash) | steeped leaf infusion, cooled, applied topically to inflamed eyes |
Doses are reproduced from the sources for practitioners and are not a recommendation for any person.
Overview. Ceanothus thyrsiflorus, known as California lilac or blueblossom, is a evergreen shrub native to coastal California and Oregon, valued in the mountain chaparral for its dense clusters of blue flowers. Eclectic physicians of the nineteenth century used the leaf, berry, and root bark, most often as a tincture, for congestive conditions of the throat, spleen, and lymphatic system. It stands alongside its better documented relative Ceanothus americanus in the same tradition of astringent, decongestant shrubs used for boggy mucous membranes and sluggish lymphatic drainage.
Clinical Notes. This is a plant reached for when tissue is congested, boggy, and discharging thick or tenacious mucus rather than thin catarrh. The classic picture from the old eclectic literature is a sore, constricted throat with real difficulty swallowing and a feeling of dryness underneath the discharge, seen in pharyngitis, tonsillitis, and the catarrhal states that follow a cold settling in the throat.
Therapy. Henderson has written a very interesting article which was published in the Annual. He says he has employed an infusion of the leaves in conjunctivitis, and as an application in inflamed eyes he has applied the steeped leaves themselves.
Drawn from Ellingwood's American Materia Medica, Therapeutics and Pharmacognosy, and the Bountiful Herbs editorial.

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