La variation des caractères épidermiques foliaires chez le Festuca rubra sensu lato (Poaceae) dans l'est du Canada

The variation structure of epidermal characters in Festuca rubra in Eastern Canada is compared with the structure produced by morphology and anatomy. This study is based on 94 specimens including native and introduced variants as well as hybrids. The characters best separating these variants are selected by a series of discriminant analyses. Epidermis then appears as useful as anatomy and morphology in establishing a taxonomical system in this aggregate of taxa. Keywords: Festuca rubra, epidermis, anatomy, morphology, discriminant analysis.