Bibliografía:
Charles Darwin, «la fecundación de las orquídeas: Biblioteca Darwin, Pamplona. Introducción de Martí Dominguez. P 12.
Titulo original: Charles Darwin: The Various contrivances by which orchids are fertilized by insects.
Tillandsia
Ralf Hesse: Three dimensional vegetation structure of Tillandsia latifolia on a coppice dune.
Watson, L., and Dallwitz, M.J. 1992 onwards. The families of Flowering Plants: descriptions, illustrations, identification, and information retrieval. Version: 17th March 2020. delta-intkey.com.
Gunnera
Bergman, B., Johansson, C., Söderbäck, E. (1992). «Tansley Review No. 42. The Nostoc-Gunnera Symbiosis.». New Phytologist 122 (3)
MOLINA, A.M. 1978. El género Gunnera en la Argentina y Uruguay.