Table 2.

References for fossils of seven genera used to constrain ages for dating.

Taxa	Time (Ma)	Location	Reference
Cercis	60–11 Late Cretaceous-Miocene	China	Tao, 1992 [58]; Tao et al., 2000 [42]
Cercis	Eocene	N America	Lavin et al., 2005 [22]
Acacia	47–42 Eocene	Liaoning, China; Tanzania	Tao et al., 2000 [42]; Lavin et al., 2005 [22]
Acacia	15 Miocene	Dominican Rep.	Lavin et al., 2005 [22]
Bauhinia	ca. 65 later Cretaceous	Helongjiang, China,	Tao et al., 2000 [42]
Cladrastis	40–20 middle Eocene	Tennessee, N America	Herendeen et al., 1992 [20]
Cladrastis	Miocene	Inner Mongolia	Tao et al., 2000 [42]
Sophora	35–9 Oligocene-Miocene	China, Siberia, N America	Tao et al., 2000 [42]; IB & NIGP, 1978 [43]
Pueraria	17–5 Miocene	Yunnan, Shandong, China	Tao, 1992 [58]; Tao et al., 2000 [42]
Dalbergia	19.5–5 Miocene	China, N America, Europe	IB & NIGP, 1978 [43]; Tao, 1992 [58]; Tao et al., 2000 [42]

IB and NIGP: Institute of Botany and Nanjing Institute of Geology and Palaeontology, Academia Sinica.