giant witchgrass
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Poales
- family: Poaceae
- genus: Panicum
- species: Panicum hirsutum
Georgetown
Demerara-Mahaica
Guyana
Manzanillo
Colima- San José Chiltepec
Oaxaca- Ciudad Valles
San Luis Potosí
Mexico