Fig. 1

The phylogenetic tree inferred for the study species according to the classification system of Soreng et al. [22]. Under this system, ВОР and РАСМАD are two main clades: ВОР comprises the subfamilies Bambusoideae, Oryzoideae and Pooideae, and РАСМАD comprises the subfamilies Panicoideae, Aristidoideae, Chloridoideae, Micrairoideae, Arundinoideae and Danthonioideae. The subfamilial and tribal attribution of the study species and some of their details are given in Table 1. On the scale: the ВОР/РАСМАD split time (60 Mya) and various lineage split times according to Chalupska et al. [27]