What is "tetragonotheca"

Tetragonotheca is a genus of North American plants in the daisy family. Nerveray is a common name for plants in this genus.

1. Tetragonotheca helianthoides L. - MS AL GA FL NC SC TN VA
2. Tetragonotheca ludoviciana (Torr. & A.Gray) A.Gray ex E.Hall - TX LA AR
3. Tetragonotheca parviflora Jacq. - West Indies
4. Tetragonotheca repanda (Buckley) Small - TX
5. Tetragonotheca texana Engelm. & A.Gray ex A.Gray & Engelm. - TX, Coahuila, Nuevo León, Tamaulipas, Jalisco, Colima

see Guizotia Rumfordia

• Tetragonotheca abyssinica - Guizotia abyssinica
• Tetragonotheca guatemalensis - Rumfordia guatemalensis