Li surface abundance versus T_eff in open clusters of different ages and [Fe/H] (see Table 1 for references; grey squares and triangles are abundance determinations and upper limits, respectively). The typical observation errorbars from the original papers are indicated by a cross in each panel. Coloured diamonds are the predictions of the models at the age and metallicity of the corresponding clusters. The models are shown for three initial velocities (slow, median, and fast are the cyan, blue, and violet diamonds, respectively), and models for median rotation only (magenta diamonds). Models from left to right in each panel correspond to masses between 1.5 M_⊙ (warmer) and 0.8 M_⊙ (cooler).