Rotation periods vs. Gaia colours for single members of M35 and M34. The colour of each symbol indicates the deviation of EW(Li) from a third order polynomial fitted to EW(Li) vs. (BP − RP)₀ for the M35 sample shown in the upper plot. Top: M35 single stars. Circles, triangles, squares, and stars have the same meaning as in Fig. 9. Bottom: M34 single stars from Gondoin (2014). Gaia colours have been dereddened following Curtis et al. (2020) with A_V = 0.217.