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The tree was tentatively rooted on Q. baloot and Q. floribunda, two western Asian oaks of Sect. Ilex (cf. Denk & Grimm, 2010; Simeone et al., 2016). Colours as in Figs. 1, 2A and File S1. Numbers 1–4 indicate the four major clades identified. Branch bootstrap support (1–100) is scaled as circles of increasing size (see also File S4 for details on clone labels and bootstrap values).
