Iva microcephala
Iva microcephala, the piedmont marsh elder or small-headed marsh-elder, is a North American species of flowering plants in the family Asteraceae. It grows in the southeastern United States in Alabama, Florida, Georgia, and the Carolinas.
Iva microcephala is a wind-pollinated annual herb sometimes as much as 100 cm in height. Leaves are very narrow, sometimes thread-like, up to 6 cm long. Flower heads are small, clustered in elongated arrays at the tips of branches, each head containing only about 5-8 flowers.