Bidens Pilosa: An Invasive Weed with Medicinal Properties

Origin and Distribution

Bidens pilosa is an annual herbaceous plant native to South America but now widely distributed across temperate regions worldwide. It is a hardy weed that can invade a wide range of habitats, including grasslands, heathlands, forests, clearings, wetlands, and plantations.

Common Names and Uses

Bidens pilosa has numerous common names, including hitchhikers, black, and sticktight. In Brazil, it is known as Picão preto and is valued for its medicinal properties.

Botanical Characteristics

The plant has small, yellow and white flowers and can reach heights of up to 2 meters. It reproduces prolifically, producing large numbers of seeds that can spread easily.

Invasive Potential

Bidens pilosa is considered a noxious weed in many areas due to its invasive nature. It can quickly form dense stands that outcompete native vegetation and disrupt ecosystems.

Medicinal Properties

Despite its invasive nature, Bidens pilosa has been used in traditional medicine for centuries. It is believed to have anti-inflammatory and blood pressure-lowering properties.