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Fitosociologia numero 44 (2)

pag. 109-118: Le praterie xerofile a Festuca trachyphylla (Hackel) Krajina della bassa Valsesia (Piemonte, Italia)

M. Lonati1 & S. Lonati2

1Dipartimento di Agronomia, Selvicoltura e Gestione del Territorio, Università di Torino, via Leonardo da Vinci 44, 10095 Grugliasco (TO); e-mail: michele.lonati@unito.it

2via Garibaldi 18, 13017 Quarona (VC); e-mail: simonelonati@libero.it 

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abstract

The xerophilous Festuca trachyphylla (Hackel) Krajina grasslands in the lower Valsesia (Piedmont, Italy). This work take into account the grasslands dominated by Festuca trachyphylla in Valsesia (Pennine Alps). The studied area is located in the northern district of Piedmont, under the influence of subatlantic climate. The vegetation study has been performed throught 13 phytosociological relevés. All data were submitted to multivariate statistical analysis. The vegetation was classified into the Poo bulbosae-Festucetum trachyphyllae ass. nova. The floristic composition includes a lot of ingressive species of Trifolio-Geranietea and Rhamno-Prunetea, in consequence of the location in the colline bioclimatic belt. Chorological, synecological and syndynamical datas were described in the paper, compared with the Jasiono-Festucetum valesiace described in the nearest Vallese (Switzerland).

keywords

pennine alps, phytosociology, syntaxonomy, valsesia, xerophilous grasslands