Isocoma pluriflora, commonly called southern jimmyweed or southern goldenbush, is a North American species of flowering perennial herbs in the family Asteraceae. It grows in northern Mexico (Baja California Sur, Sonora, Chihuahua, Coahuila, Nuevo León) and in the southwestern and south-central United States (Arizona, New Mexico, Colorado and Texas).Biota of North America Program 2014 county distribution mapSEINet, Southwestern Biodiversity, Arizona chapter photos, descriptions, distribution mapNesom, G.L. 1991. Taxonomy of Isocoma (Compositae: Astereae). Phytologia 70(2): 69–114 description and discussion of I. pluriflora on pages 102-106, distribution map on page 73
Isocoma pluriflora grows tall. Leaves are narrow, up to 5 cm (2 inches) long. The plant produces numerous flower heads in a cluster at the top of the stem, each head with 8-21 yellow disc flowers but no ray flowers. The species is named "pluriflora", 'many flowered', for its up to 25-50 vertical and approximately parallel stalks, tipped with yellow golden flower heads.Flora of North America, Isocoma pluriflora (Torrey & A. Gray) Greene, 1894. Southern jimmyweed
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External links photo of herbarium specimen at Missouri Botanical Garden, collected in western Texas in 1849