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Table 1 Linear and curvilinear regression analysis of relative growth rate (X) of anther heights and stigma heights against bud length, for pin and thrum floral morphs

From: Developmental variation and the evolution of distyly in Hedyotis caerulea (Rubiaceae)

A. Linear regression
Anthers	X		y-intercept	P(x)	r ²	N
Pin	0.43 ± 0.01		0.13 ± 0.01	<0.0001	0.88	212
Thrum	0.69 ± 0.01		0.05 ± 0.01	<0.0001	0.95	219
Stigmas
Pin	0.91 ± 0.03		−0.06 ± 0.02	<0.0001	0.84	212
Thrum	0.67 ± 0.02		−0.04 ± 0.02	<0.0001	0.84	219
B. Polynomial regression
Anthers	X ²	X	*y-intercept*	*P(x* ² )	*P(x)*	r ²
Pin	−0.01 ± 0.04	0.45 ± 0.07	0.12 ± 0.03	0.840	<0.0001	0.88
Thrum	0.09 ± 0.04	0.54 ± 0.06	0.11 ± 0.03	0.019	<0.0001	0.95
Stigmas
Pin	−0.04 ± 0.10	0.97 ± 0.17	−0.08 ± 0.06	0.706	<0.0001	0.84
Thrum	−0.43 ± 0.06	1.40 ± 0.11	−0.31 ± 0.04	<0.0001	<0.0001	0.87

Regression equations are based on log transformed data combined for the five populations of H. caerulea.

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