Eupatorium pilosum is a perennial herb, 30-150 cm tall, most parts rough hairy and sprinkled with tiny glandular dots.
Leaves opposite, stalk short to none, blade reduced and sometimes alternate above, lance-shaped, coarsely, unevenly toothed, major veins 3, often lacking teeth near leaf tip.
Flowers white, heads 5-flowered, bracteate base about 0.5 cm tall; inflorescence open, flat-topped; blooms Sept.
Fruit dry, 1-seeded, 5-angled plumed achene, wind dispersed.
Wetland status: FACW.
Frequency in NYC: Very infrequent.
Habitat: Open bogs or part shade, acid, sandy soil.