Floristic composition of disturbed tropical montane cloud forest and its ecotones in the National Park Cañón del Río Blanco, Veracruz, Mexico Authors: Vargas-Rueda, Abel Felipe, Rivera-Hernández, Jaime Ernesto, Álvarez-Aquino, Claudia, Salas-Morales, Silvia Hortensia, Alcántara-Salinas, Graciela, Pérez-Sato, J. Antonio