hairy fournwort
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Lamiales
- family: Acanthaceae
- genus: Tetramerium
- species: Tetramerium nervosum
Bagaces
Guanacaste
Costa Rica
Bahía de Caráquez
Manabí
Ecuador
Berlín
Usulután
El Salvador
Rinconada
Veracruz
Mexico