Botanical atlas
Dull Oregon Grape
Mahonia nervosa
Long before it had a Latin name, this low forest shrub was known to Pacific Northwest peoples including the Coast Salish, Skagit, and Cowlitz, who scraped its bright yellow inner bark and simmered the roots into bitter decoctions. The berberine that colors the wood so vividly also made the plant a go-to bitter tonic, traditionally used to stir a sluggish appetite, ease digestive complaints, and support the liver after a heavy winter of stored foods. Root preparations were also applied traditionally for skin troubles and low-grade infections, and the same golden roots were boiled down by basket weavers and settlers alike to dye wool, cedar bark, and cloth a deep, sunny yellow. It grows as a quieter, shorter-statured cousin of the more famous Oregon grape, Mahonia aquifolium, sharing its chemistry but hugging the forest floor instead of standing tall.
In tradition.
Long before it had a Latin name, this low forest shrub was known to Pacific Northwest peoples including the Coast Salish, Skagit, and Cowlitz, who scraped its bright yellow inner bark and simmered the roots into bitter decoctions. The berberine that colors the wood so vividly also made the plant a go-to bitter tonic, traditionally used to stir a sluggish appetite, ease digestive complaints, and support the liver after a heavy winter of stored foods. Root preparations were also applied traditionally for skin troubles and low-grade infections, and the same golden roots were boiled down by basket weavers and settlers alike to dye wool, cedar bark, and cloth a deep, sunny yellow. It grows as a quieter, shorter-statured cousin of the more famous Oregon grape, Mahonia aquifolium, sharing its chemistry but hugging the forest floor instead of standing tall.
Traditional preparations.
A traditional bitter tonic, taken in small amounts before meals to help stir digestion, in the old bitters tradition.
Traditionally, 1 teaspoon of dried, chopped root is simmered gently in 250 ml of water for 15 to 20 minutes, then strained and taken in small sips, a few tablespoons at a time.
Safety.
Dull Oregon grape contains berberine, which is avoided during pregnancy and breastfeeding and should never be given to infants due to a risk of jaundice. Berberine can also interact with certain antibiotics and blood thinners.
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