Media type: E-Article Title: Avant-Propos Contributor: Aymonin, Gérard G. imprint: Informa UK Limited, 1986 Published in: Bulletin de la Société Botanique de France. Lettres Botaniques Language: French DOI: 10.1080/01811797.1986.10824685 ISSN: 0181-1797 Keywords: General Earth and Planetary Sciences ; General Environmental Science Origination: Footnote: Access State: Open Access