A glaucous green plant resembling opopanax. Its root is perennial and large, from which arise smooth stems, 8 or 10 feet high, and over 1 inch in diameter at the base, having petiolate, somewhat bi-pinnate leaves, about 2 feet long; the pinnae are in 3 pairs, the leaflets are inciso-pinnatifid, with oblong, mucronulate, entire, or straightly-lobed segments, from 1 to 5 inches long, and 1/2 inch to 2 inches broad. The petiole is downy, very large, and sheathing at the base. The umbels are proliferous and racemose, being composed of partial, globose umbels, on short stalks, often arranged in a spiked manner. The flowers are white, sessile, and immersed in wool. The fruit, which is elliptical and compressed, is also buried in wool, and surrounded by a broad, flat edge.

Antitumor, emmenagogue; antispasmodic, carminative, diaphoretic, mildly diuretic, expectorant, poultice, stimulant and vasodilator (resin)

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King's American Dispensatory

In the treatment of chronic bronchitis, asthma and catarrh, for swellings of the joints and indolent tumours, catarrh, leucorrhoea, in the headache resulting from disease of the frontal sinuses, in affections of the optic nerve, in catarrhal affections of the throat, nasal passages, eyes, ears and stomach, mucous diarrhoea, to indolent buboes, white swelling, tumor of the joints, chronic glandular enlargement, and other indolent swellings.