Local tree methods for classification: a review and some dead ends by Alice Cleynen (IMAG, Univ Montpellier, CNRS, UMR 5149, Montpellier, France) Louis Raynal (Centre Hospitalier Départemental Vendée, La Roche-sur-Yon, France) Jean-Michel Marin (IMAG, Univ Montpellier, CNRS, UMR 5149, Montpellier, France)