About Centromadia fitchii (A.Gray) Greene
Centromadia fitchii, commonly known as Fitch's spikeweed or Fitch's tarweed, is a species of flowering plant in the tribe Madieae, family Asteraceae, native to North America. This species is native to California and southwestern Oregon. It is an herb that grows up to 50 cm (20 inches) tall. It produces clusters of numerous yellow flower heads that contain both ray florets and disc florets.