Trillium Ridge Flora and Fauna
Sweet Joe Pye Weed
Eupatorium purpureum 
Location: south fenceline midway; also under hickories at woods edge
This is one of the few woodland plants that attracts butterflies in droves! The large pink flowers appear in late summer and early fall, and are much sought after by Monarchs, Swallowtails and numerous other butterflies.The highly textured leaves are attractive all summer long. Grows four to six feet tall in rich, medium soil.Very versatile, it thrives in shaded woodlands or full sun and makes an excellent garden plant.
Link photo  
Genus: Eupatorium (herbaceous perennial plants)
Family: Asteraceae (compositae ( aster, daisy, or sunflower family))
Order: Asterales (asterales)
Class: Magnoliopsida (Dicots)
Phylum/Division: Magnoliophyta (Flowering plants)
Kingdom: Plantae (Plants)