Yellow Starthistle is a flowering plant native to Europe and Asia, known for its bright yellow flowers and spiny leaves. It typically grows in disturbed areas, such as roadsides and pastures, and can reach heights of up to three feet. The plant blooms from late spring to early fall, attracting various pollinators. This species is considered an invasive weed in many regions, particularly in the western United States. It can outcompete native plants for resources, leading to reduced biodiversity. Management strategies often include mechanical removal and herbicide application to control its spread and protect local ecosystems.