Evolution as a function of T_eff for P_rot, ϵ(Li) and v_surf for some models described in Table 5, as labeled on the plots. The position of 37 Com is reported on each panel. Its lithium abundance is that determined in the present study: A(Li) = 1.23 ± 0.15. The error bar on the effective temperature is about 100 K. In the upper panel, we also show the photometric period, which is not compatible with the other indicators, contrary to the one derived from ZDI and adopted in the present study. In the middle and lower panels, the colours are the same as in Fig. 8.