Table 2.

Multiple PGLS regressions fitted by maximum likelihood across Coffea without outgroups for each trait. Significant predictors are marked in bold. For stomatal density, leaf area and SLA, n = 58; for stomatal length, stomata width and pore width, n = 55.

Trait	Variable	Standardized regression coefficient	Standard error	t-value	P-value
Stomatal density λ = 0.652 (NA; 0.891) Adjusted R2 = 0.311	Intercept	0.11	0.53	5.49	<0.001
	SLA	−0.25	0.11	−2.15	0.036
	Stomatal length	−0.79	0.18	−4.41	<0.001
	Stomatal width	0.31	0.17	1.81	0.076
Leaf area λ = 0.742 (NA; 0.963) Adjusted R2 = 0.3258	Intercept	−0.57	0.61	−10.70	<0.001
	Maximum height	0.31	0.10	3.17	0.003
	Pore width	0.18	0.10	1.86	0.069
	Latitude	0.59	0.24	2.45	0.018
	Climate PC2	−0.41	0.11	−3.84	<0.001
	Climate PC3	0.35	0.16	2.22	0.031
SLA λ = 0 (NA; 0.635) Adjusted R2 = 0.1796	Intercept	0.00	0.12	0.67	0.509
	Leaf area	−0.30	0.14	−2.05	0.046
	Stomatal length	−0.11	0.14	−0.79	0.432
	Longitude	−0.41	0.18	−2.34	0.024
	Altitude	0.87	0.47	1.84	0.072
	Climate PC1	0.75	0.43	1.74	0.088
	Climate PC2	−0.19	0.14	−1.39	0.170
	Climate PC3	0.44	0.32	1.37	0.177
Stomatal length λ = 0 (NA; 0.524) Adjusted R2 = 0.7764	Intercept	0.00	0.06	3.42	0.001
	Stomatal density	−0.29	0.07	−4.16	<0.001
	Stomatal width	0.61	0.08	8.06	<0.001
	Pore width	0.23	0.07	3.16	0.003
Stomatal width λ = 0 (NA; 0.169) Adjusted R2 = 0.6893	Intercept	0.00	0.08	3.01	0.004
	Leaf area	0.16	0.08	2.08	0.043
	Stomatal length	0.82	0.08	10.71	<0.001
	Climate PC3	0.13	0.08	1.67	0.100
Pore width λ = 0 (NA; 0.172) Adjusted R2 = 0.3416	Intercept	0.00	0.11	2.40	0.020
	Leaf area	0.17	0.11	1.49	0.141
	Stomatal length	0.57	0.11	5.15	<0.001