spear-leaf agoseris
Agoseris retrorsa Greene
Agoseris retrorsa is a North American species in the Asteraceae family, known as spear-leaf agoseris. It is found in Washington, Nevada, Utah, Arizona, California, Oregon, Baja California, and the Mexico Northwest region. This herb features rosette leaves and yellow ligulate flowers.
Description
Agoseris retrorsa is a herbaceous plant with rosette leaves that are linear-elliptic or linear, 7.0–36.0 cm long, and may be entire, pinnatifid, or dentate. The peduncle is 15.0–94.0 cm long and glabrescent. The flower heads contain 10–100 yellow ligulate flowers, with a corolla tube 8.0–20.0 mm long and a ligule 6.0–15.0 mm long. Involucral bracts are either glabrous or villose, with a purplish or green center. Achenes are narrowly obovoid, 5.0–7.0 mm long, with a beak 10.0–25.0 mm long. The pappus is 11.0–20.0 mm long. It is native to the western United States and northern Mexico.
Other common names
Spearleaf agoserisspear-leaf agoseris
Distribution
Washington · Nevada · Utah · Arizona · California · Oregon · Baja California · Mexico Northwest
Synonyms
Troximon retrorsum
