Isocoma hartwegii is a Mexican plant species in the family Asteraceae. It has been found in the states of Jalisco, Zacatecas, Aguascalientes, Hidalgo, Guanajuato, and San Luis Potosí.
Isocoma hartwegii is a subshrub. Each flower head has 13-22 disc flowers but no ray flowers.Nesom, G.L. 1991. Taxonomy of Isocoma (Compositae: Astereae). Phytologia 70(2): 69–114 description of I. humilis on pages 91-92, distribution map on page 73
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