Gutiérrez, J., Terrazas, T., & Solano, E. (2016).

Petronymphe rara a new species of Oaxaca, Mexico and the rediscovery of P. decora (Asparagaceae: Brodiaeoideae)

. Phytotaxa, 269(2), 113–119. https://doi.org/10.11646/phytotaxa.269.2.4