Nat. ord, Asclepiadaceae.

Pleurisy-root. Butterfly-weed.

This plant is indigenous to the United States; most abundant in the southern States.

From the- large, irregularly tuberous, branched, and fleshy perennial root arise numerous erect or procumbent hairy stems, about 3 feet in height. The very handsome, reddish-orange-coloured flowers are disposed in terminal or lateral corymbose umbels.

The fresh root has a subacrid, nauseous taste; the dried root is bitter.

A partial proving of this is given in Hale's New Remedies. Part employed. - The root. Preparations. - Tincture. Trituration.