Sub-category: Aster family
It was introduced to American colonists by Indians who used the plant for breaking fevers by means of heavy sweating. Grows about 1 m tall, with leaves that clasp the stems and dense clusters of white heads held above the foliage. Tiny, white flowers are arranged in fuzzy clusters top the 3 to 6 ft. stems of this perennial. Hairy plant with dense flat-topped clusters of many dull-white flowers. Paired leaves, united basally, are perforated by the erect stems.
Habitats include moist woods and thickets; swamps.