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Acta Botanica Gallica
Botany Letters
Volume 145, 1998 - Issue 4
322
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Original Articles

Anatomical plasticity in species of Deschampsia P. Beauv. (Poaceae) in SW Europe (Iberian Peninsula)

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Pages 281-305 | Published online: 27 Apr 2013
 

Summary

The utility of leaf anatomy in the taxonomy of the genus Deschampsia is discussed. To this end, the inter-and intra-populational variability of this character is analyzed in the taxa of the genus which are represented in the Iberian Peninsula (Deschampsia cespitosa (L.) Beauv. s.l., D. setacea (Huds.) Hack, and D. flexuosa (L.) Trin.), as well as in Holcus grandiflorus Boiss. and H. caespitosus Boiss., two Spanish endemic species which some authors include in Deschampsia. A critical analysis of their observed anatomical plasticity is given, evidencing the great intra-individual variability when wild plants are grown under experimental conditions.

Résumé

On discute ici de l'utilité de l'anatomie des feuilles dans la taxonomie du genre Deschampsia. On analyse ainsi la variabilité de ce caractère au sein de différentes populations, ainsi que dans les taxa du genre representés dans la Péninsule Ibérique (Deschampsia cespitosa (L.) Beauv. s.l., D. setacea (Huds.) Hack, et D. flexuosa (L.) Trin.) enfin dans les taxa Holcus grandiflorus Boiss. et H. caespitosus Boiss., endémiques espagnoles parfois placés dans le genre Deschampsia. L'analyse critique de la plasticité anatomique trouvée met en relief un taux elevé de variabilité intra-individuelle quand on fait croître les plantes sauvages dans des conditions expérimentales de culture.

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