Setaria verticillata, commonly known as the bristly foxtail, is a species of grass belonging to the Poaceae family. In the Comunidad Valenciana, this plant is known as "grama de cepillo" due to its distinctive brush-like seed heads.

This annual grass species is typically found in disturbed areas such as roadsides, fields, and gardens, where it frequently grows alongside other weedy species. It thrives in a wide range of soil types but prefers well-drained, nutrient-rich environments.

• Physical Characteristics:
  • Height: Setaria verticillata typically grows to a height of 30 to 100 cm.
  • Leaves: The leaves are linear, flat, and can grow up to 15-30 cm long.
  • Flowers: The inflorescence is characterized by dense, cylindrical spikes, resembling the tail of a fox, hence the name "foxtail". Each spike is covered with bristly hairs and small, greenish flowers.
• Reproduction:
  • Setaria verticillata reproduces by seeds which are easily dispersed by wind and animals, especially due to the sticky nature of its bristles.
• Ecological Impact:
  • As an invasive species in some regions, Setaria verticillata can outcompete native flora, leading to reduced biodiversity.
  • It is often considered a weed in agricultural settings, where it can compete with crops for resources.
• Uses:
  • While primarily considered a weed, in some regions it is used as fodder for livestock when young and tender.