Trigonospermum is a genus of Mesoamerican plants in the daisy family. Species 1. \n* Trigonospermum adenostemmoides Less. - Chiapas, Veracruz 2. \n* Trigonospermum annuum McVaugh & Lask. - Jalisco 3. \n* Trigonospermum auriculatum B.L.Turner - Guerrero 4. \n* Trigonospermum hintoniorum B.L.Turner - Tamaulipas, Nuevo León 5. \n* Trigonospermum melampodioides DC. - Oaxaca, Chiapas, Michoacán, Jalisco, Guerrero, Sinaloa, Morelos, Nayarit 6. \n* Trigonospermum stevensii S.D.Sundb. & Stuessy - Nicaragua, Guatemalaformerly included see Sigesbeckia \n* Trigonospermum blakei - Sigesbeckia blakei