Froelichia humboldtiana, also known as snakecotton or "ervanco" is an erect or decumbent subshrub which is native to Central America. It is responsible for causing numerous cases of primary photosensitization in horses, donkeys, cattle, and other livestock in Brazil.
- Dermatitis
- Edema
- Necrosis
- Weakness
- Myiasis
- Pruritis
- Self-mutilation
