Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Hernández-Rojas, Adriana; Kessler, Michael; Krömer, Thorsten; Carvajal-Hernández, César; Weigand, Anna; Kluge, Jürgen (2018). Richness patterns of ferns along an elevational gradient in the Sierra de Juárez, Oaxaca, Mexico: a comparison with Central and South America. American Fern Journal, 108(3):76-94.