Rudgea sclerocalyx
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Gentianales
- family: Rubiaceae
- genus: Rudgea
- species: Rudgea sclerocalyx
Santa Isabel do Rio Negro
Amazonas
Brazil
Maroa
Amazonas
Venezuela
Rudgea sclerocalyx Santa Isabel do Rio Negro Maroa