Fig. 1: Phylogenetic tree scaled to geological time of Asteraceae with 2723 sampled tips.
From: The rise of grasslands is linked to atmospheric CO2 decline in the late Palaeogene
Asteraceae is one of the most species-rich families of flowering plants with more than 23,000 species. The number of non-sampled (missing) species increases enormously towards the more derived and species-rich lineages. For this reason, the sampling among clades is severely biased. Note that these rich and derived lineages evolved during the late Paleogene or early Neogene. K Cretaceous, Pg Paleogene, Ng Neogene.
