Habit: Ageratum conyzoides grows as an annual herb to 60 cm in height when in flower. The leaves are arranged oppositely, to 9 cm in length (usually smaller), up to 6 cm wide, triangular to ovate to cordate with an obtuse leaf apex and a crenate margin. The leaves and stems have a covering of pubescence.
The complete, perfect, actinomorphic flowers are arranged in terminal cymes of heads. The head is subtended by glandular pubescent phyllaries forming an involucre in 2 series. The calyx is reduced to bristles (pappus). The corolla has 5, fused, blue to lavender pubescent petals. There are 5, purplish blue stamens that are fused to the inside of the corolla tube. The inferior ovary has a single locule. The fruit is an angular achene with ridges along the edges.
Habitat: Ageratum conyzoides grows in Human Altered environments such as yards, gardens, roadsides, abandoned fields, farms and edges of natural areas.
Distribution: Ageratum conyzoides is an INVASIVE WEED. Native to tropical South America it now occurs globally.
Medicinal/Cultural/Economic usage: Ageratum conyzoides is not known to be used medicinally in the Bahamas.