Origin:
A native plant, found in the United States from North Carolina south to Florida, and along the Gulf Coast to Texas. It also is found in the West Indies.
Biology:
A perennial that reproduces from seeds. Plants especially favor sandy soils, and may be found along roadsides or in disturbed waste areas. Generally not considered a weed problem.
Identification:
The common name for the plants in this genus is derived from the thick, black roots. The stems and leaves are coated with a fine, white pubescence, giving the plants a soft texture. The stems are “winged” along their length with raised ridges on three sides. The leaves are elongate lance-shaped, with wavy or notched margins, and attach to the stem without a stalk. The unusual flower heads are at the ends of the stems, and are elongate and cone-shaped, wider at their base than the tip. They are composed of many small, white flowers that attach tightly to the stem to create the dense cluster.
Characteristicts Important to Control:
Control is not needed for this plant. If found growing where not wanted it can be removed by hand.
