Table 1.

Absolute age estimations of main orchid lineages under strict and relaxed clock models.

MRCA	Strict clock						Relaxed clock
	Stem branch length	Mean age	Age (95% HPD lower bound)	Age (95% HPD upper bound)	95% HDP length	Age (median)	Stem branch length	Mean age	Age (95% HPD lower bound)	Age (95% HPD upper bound)	95% HDP length	Age (median)
270—Orchidaceae	35.35	88.15	84.78	91.71	6.93	88.15	23.90	89.81	80.99	95.91	14.92	88.15
271—Apostasioideae	48.38	39.77	37.71	41.88	4.17	39.75	53.39	36.42	8.59	62.25	53.65	36.15
276—Vanilloideae	3.95	80.96	77.63	84.29	6.66	80.95	12.65	67.69	52.73	80.94	28.20	68.29
280—Cypripedioideae	38.52	31.54	29.70	33.23	3.52	31.53	38.39	38.48	21.66	55.84	34.18	37.59
289—Orchidoideae	5.43	57.76	55.38	60.33	4.96	57.75	8.42	60.02	48.91	70.72	21.80	60.05
291—Diurideae	1.42	54.36	51.85	56.86	5.01	54.35	12.37	40.85	29.52	52.02	22.51	40.65
292—Cranichideae	9.76	46.02	43.86	48.08	4.22	46.02	11.63	41.59	29.62	53.64	24.02	41.42
304—Orchideae	15.30	38.48	36.35	40.61	4.25	38.46	13.19	41.11	29.85	52.68	22.84	41.00
320—Epidendroideae	18.67	44.52	42.54	46.58	4.05	44.50	8.22	60.23	48.38	71.60	23.22	60.27
321—Neottieae	8.89	35.63	33.79	37.55	3.76	35.62	3.97	56.26	43.08	69.24	26.17	56.47
347—Sobralieae	33.06	7.67	6.99	8.38	1.39	7.66	41.83	11.51	5.72	19.00	13.28	10.93
356—Arethuseae	16.85	19.77	18.46	21.03	2.56	19.77	23.58	22.53	12.55	34.78	22.23	21.66
363—Malaxideae	2.22	33.74	32.24	35.24	3.00	33.74	7.85	36.99	27.49	46.87	19.39	36.74
410—Collabieae	14.60	17.32	16.00	18.57	2.57	17.32	13.47	22.47	10.72	35.05	24.33	22.08
416—Epidendroideae	2.56	32.18	30.81	33.63	2.82	32.17	5.21	35.48	28.12	42.53	14.41	35.41
460—Vandeae	8.91	25.60	24.13	27.05	2.92	25.59	9.31	30.77	22.20	39.32	17.12	30.76
484—Cymbidieae	2.94	31.57	30.18	32.97	2.79	31.57	4.67	35.42	28.23	42.89	14.65	35.32