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Jeffersonia diphylla (L.) Pers.

Figure 110.—Twinleaf (Jeffersonia diphylla)
Other common names.—Jeffersonia, rheumatism root, helmetpod, ground-squirrel pea, yellowroot.

Habitat and range.—Twinleaf inhabits rich shady woods from New York to Virginia and westward to Wisconsin.

Description.—Twinleaf is only about 6 or 8 inches in height when in flower but reaches a height of 18 inches at the fruiting stage. The long-stemmed, smooth leaves are almost completely divided into two leaflets and arise directly from the base of the plant. The white flowers measuring about 1 inch across. which appear early in spring, are borne singly on a slender stalk arising from the root and are followed by a leathery, somewhat pear-shaped capsule containing many seeds. Twinleaf has a thick, knotty, yellowish-brown, horizontal root. stock with man fibrous, much-matted roots.

Part used.—The rootstock, collected in autumn.

Sievers, A.F. 1930. The Herb Hunters Guide. Misc. Publ. No. 77. USDA, Washington DC.
Last update Friday, April 3, 1998 by aw