Table 3.

Opposite versus same orientation in grapevine (Vitis and Ampelopsis spp.) leaf pairs. For different Vitis and Ampelopsis species, and Vitis hybrids, the number of leaf pairs with opposite versus same PC4 sign (figure 5d), the number of leaf pairs, the ratio of the number of opposite-to-same pairs and the p-value for the one-sided exact test that the odds ratio of opposite-to-same pairs exceeds unity are provided.

species	opposite	same	n	ratio	p-value
Vitis riparia	646	197	843	3.28	2.20 × 10−16
Vitis labrusca	287	96	383	2.99	6.01 × 10−13
Vitis cinerea	268	92	360	2.91	8.40 × 10−12
Vitis rupestris	201	102	303	1.97	3.08 × 10−5
Vitis acerifolia	165	44	209	3.75	3.85 × 10−10
Vitis amurensis	146	61	207	2.39	1.40 × 10−5
unidentified Vitis spp.	143	59	202	2.42	1.41 × 10−5
Vitis vulpina	108	47	155	2.30	0.0002962
Vitis aestivalis	70	26	96	2.69	0.0008781
Vitis coignetiae	37	21	58	1.76	0.09458
Ampelopsis glandulosa	38	9	47	4.22	0.001473
Vitis palmata	27	18	45	1.50	0.2274
Vitis xchampinii	26	6	32	4.33	0.008431
Vitis piasezkii	15	9	24	1.67	0.2806
Ampelopsis cordata	6	5	11	1.20	0.5789
Vitis thunbergii	6	5	11	1.20	0.5789
Vitis xandersonii	9	1	10	9.00	0.07043
Ampelopsis aconitifolia	4	5	9	0.80	0.7578
Vitis xdoaniana	9	0	9	∞	0.02167
Vitis xnovae-angliae	5	2	7	2.50	0.3776