Abstract
Jeffersonia diphylla (L.) Pers. (BERBERIDACEAE)—Madison County: approximately 25 plants consisting of 9 to 21 leaves per plant observed at the transition zone of mature hemlock / mixed mesophytic forest and base of a mesic mafic cliff and ledges, on northfacing slopes, private property draining into the Ivy River at 530 m (1,750 ft.) elevation. Lat/ Long: N 35u46910.810, W 082u38928.670. Kevin Caldwell s.n. and Josh Kelly, 13 April 2007 (WCUH). Significance. The population represents Madison County’s first known record and the second extant site of three total reported sites in North Carolina. It occurs at the southeastern periphery of its range at this site and it represents the northern and eastern-most population in North Carolina. Regionally, it is more common in the limestone country in Tennessee southwest into Alabama. An extant population in Jackson County, estimated at between 500 and 1,000 plants, was reported by Pittillo (1992). The first and historical population reported by Radford, Ahles, and Bell (1968) for Jackson County has not been relocated.
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