Spanish needles

Spanish Needles (Bidens pilosa) is a species of flowering plant in the Asteraceae family. It is native to the Americas but is widely distributed as an invasive species worldwide.

Description

Spanish Needles is an annual herb that can grow up to 1.8 meters tall. The leaves are oppositely arranged and pinnately divided. The plant produces small white flowers followed by fruits that are black, elongated, and armed with two to four barbed awns. The awns catch onto fur or clothing, hence the common name "Spanish Needles".

Distribution and Habitat

Spanish Needles is native to the Americas, but it has become naturalized in tropical and warm temperate regions worldwide. It is often found in disturbed sites and cultivated areas, where it is considered a weed.

Uses

Despite its status as a weed, Spanish Needles has several uses. It is used in traditional medicine in many cultures to treat a variety of ailments. The young leaves and shoots are edible and are often used in salads and soups.

Control

Control of Spanish Needles involves regular weeding and, in some cases, the use of herbicides. However, its prolific seed production and the ability of the seeds to stick to clothing and animal fur make it a difficult weed to control.

References

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