Table 2.

Oceanic island calibration points used for the divergence time analysis for subgenus Plantago

Island	Mean age	Reference	Endemic taxa
Lord Howe Island	6.9 Ma	Zielske, Ponder, & Haase, 2017; McDougall, Embleton, & Stone, 1981	P. hedleyi
New Amsterdam Island	0.3 Ma	Doucet, Weis, Scoates, Debaille, & Giret, 2004	P. stauntonii
Juan Fernández Islands	5.8 Ma	Anderson, Bernardello, Stuessy, & Crawford, 2001; Stuessy, Foland, Sutter, & Silva, 1984	P. fernandezia
Hawaiian Islands	5.1 Ma	Ree & Smith, 2008; Fleischer, McIntosh, & Tarr, 1998	P. hawaiensis P. pachyphylla P. princeps s.l.
Rapa Iti	5.1 Ma	Zielske et al., 2017; Krummenacher & Noetzlin, 1966	P. rupicola P. rapensis