Asteraceae (Composite Sunflower) Family
Flowers are much branched and nearly flat-topped. Heads are about 1/4 inch long, numerous; bell-shaped; all disc flowers. Styles are filiform and about twice the length of the corolla, which is conspicuous and bluish (photographs lavender). Bracts are green and small. Flowers occur in the autumn.
While the Blue Boneset is often associated with the Ageratum Mist Flower, the two species are very separate. The Latin, ivaeifolium or ivifolium, refers to the exceptionally willowy slender leaf," which is thin and ivy-shaped.
The plant is known in Mississippi, Alabama and Florida. A specimen collected in 1998 was the first recorded for Alabama.