Résumé.· Treize taxons de la famille des Orchidées (tribu des Neottiae Lindl.) ont été étudiés d'un point de vue caryologique. Les nombres chromosomiques précédemment cités chez huit d'entre eux, de même que l'aneuploïdie signalée chez Epipactis atrorubens, E. helleborine, Goodyera repens et Listera cordata ont été retrouvés dans les populations du sud de la France. A l'exception de Goodyera repens et Spiranthes spiralis diploïdes et caractérisés par un caryogramme symétrique, toutes les autres espèces sont remarquables par leur état tétraploïde et des caryogrammes fortement dissymétri· ques.Summary.· Thirteen taxons from the Orchids family ( tribe of Neottiae Lindl.) were studied for their caryology. Chromosome numbers were confirmed for eight of them and also the aneuploidy previously mentioned for Epipactis atrorubens, E. hel/eborine, Goodyera repens and Listera cordata in populations from the south of France. Except for Goodyera repens and Spiranthes spiralis which are diploids and characterized by a symetrical karyogram, ali the species are characterized by their tetraploidy and highly non symetrical karyogram.
Some data about utilization of species related to the genus Bupleurum L. (Umbelliferae). The trivial names of the most common species belonging to the genus Bupleurum L. (Umbelliferae) are given. These species are utilized as such (food, firewood, ornementation...) or as raw material (traditional and modern pharmacopeia). 46 references.
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