Table 2.

Linear selection differential (β₂) on plasticity slopes.

	Model 1				Model 2
	β 2	SE	t	p	β 2	SE	t	p
Floral trait
Floral diameter	0.022	0.139	0.158	0.875	0.003	0.136	0.020	0.984
Corolla tube length	−0.012	0.139	−0.089	0.930	0.036	0.146	0.244	0.808
Cyanidin content	−0.165	0.137	−1.200	0.234	−0.034	0.239	−0.143	0.887
Kaempferol content	−0.023	0.139	−0.165	0.869	0.460	0.344	1.336	0.186
Brightness	0.050	0.139	0.359	0.721	0.005	0.138	0.036	0.971
Chroma	−0.121	0.138	−0.875	0.384	−0.154	0.143	−1.081	0.283
Chromatic contrast	−0.309	0.134	−2.306	0.024	−0.899	0.304	−2.954	0.004
Achromatic contrast	0.203	0.137	1.482	0.143	0.165	0.158	1.040	0.302
Corolla shape component 1	0.097	0.138	0.702	0.485	0.099	0.138	0.719	0.474
Corolla shape component 2	−0.048	0.139	−0.346	0.730	0.056	0.215	0.263	0.794
Corolla shape component 3	−0.094	0.138	−0.683	0.497	−0.040	0.140	−0.283	0.778
Corolla shape component 4	0.042	0.139	0.303	0.763	0.047	0.145	0.325	0.746
Leaf economics spectrum traits
Specific leaf area	0.182	0.137	1.327	0.189	0.199	0.145	1.370	0.175
Leaf dry matter content	−0.024	0.139	−0.176	0.861	0.047	0.147	0.319	0.751
Nitrogen content	0.177	0.137	1.289	0.202	0.147	0.146	1.004	0.319
Carbon to nitrogent content	0.144	0.138	1.046	0.299	0.169	0.159	1.066	0.290
Phosphorous content	0.149	0.149	1.001	0.321	0.230	0.180	1.277	0.206
Potassium content	0.037	0.150	0.250	0.803	−0.022	0.150	0.147	0.864
Life history traits
Plant height	0.200	0.137	1.462	0.148	0.550	0.123	4.473	0.001
Number of flowers	−0.557	0.123	4.540	0.001	0.564	0.122	4.611	0.001
Plant size	0.639	0.117	5.453	0.001	−0.207	0.164	−1.262	0.211
Number of ovules	0.165	0.137	1.198	0.235	0.184	0.130	1.415	0.161

Selection differential was calculated as the relationship between the slopes of the reaction norms and the total fitness of the genotypes. The reaction norm slopes were included in the analyses as absolute values and fitness as the total number of seeds produced by each genotype combining all environments. In Model 1, the slopes were tested without including intercepts to find the total selection acting on plasticity (Equation 5 in the Methods section). In Model 2, the slopes were tested including the intercepts to find the selection acting on plasticity independent on the trait mean values (Equation 6 in the Methods section). Numbers in bold indicate significant effects. See Supplementary Table S2 and Supplementary Method S3 for trait definition.