Fig. 2
From: Genome sequence of Apostasia ramifera provides insights into the adaptive evolution in orchids
Population size histories of seven orchid species, including P. aphrodite (yellow), D. catenatum (green), P. equestris (purple), D. officinale (dark blue), V. planifolia (pink), A. shenzhenica (light blue) and A. ramifera (red), between 10 000 and 10 million years ago. Generation times of orchids were assumed to be four years, and mutation rate per generation was 0.5 × 10− 8