Couch Grass (Elymus repens) vs Pau d'Arco (Tabebuia impetiginosa)

Couch Grass (Elymus repens)

Pau d'Arco (Tabebuia impetiginosa)

About

Couch grass is a vigorous perennial growing to 32 inches with a long, creeping rhizome, slender leaves, and erect spikes bearing green flowers aligned in two rows. Found in Europe, the Americas, northern Asia, and Australia, it is an invasive weed harvested throughout the year. In classical times, both Dioscorides (40-90 CE) and Pliny (23-79 CE) recommended couch grass root for poor urine flow and kidney stones. The herbalist John Gerard wrote in 1597 that 'Couch-grasse be an unwelcome guest to fields and gardens, yet his physicke virtues do recompense those hurts; for it openeth the stoppings of the liver and reins [ureters] without heat.' In times of famine, the root was roasted and ground as a substitute for coffee and flour.

Pau d'arco is an evergreen tree that can reach 100 feet in height, producing pink flowers. The bark of this South American tree has been treasured for centuries in traditional medicine for its extensive health benefits. Indigenous peoples including the Incas and the Callawaya valued it as a cure-all. The tree grows in both mountainous terrains high in the Andes and in low-lying areas of Paraguay and Brazil. The prized inner bark is collected from wild-growing trees throughout the year.

Safety & precautions

Generally safe. No known warnings for normal use.

If taking anticoagulant medication, use only under professional supervision. Do not take during pregnancy. Avoid if trying to conceive. High doses may cause nausea, vomiting, intestinal discomfort, and anticoagulant effects. Blood clotting disorders are a contraindication.

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