Table 2. Results of the zero-inflated negative binomial (ZINB) regression models predicting the odds of chasmogamous and cleistogamous buds developing and expected bud counts as a function of the averaged, z-score transformed environmental variables from 2016 and 2017.

Chasmogamous ZINB	Theta = 1.68, Log-likelihood = -230 on 11 DF
Binary model (0 vs. 1 bud)	Estimate	SE	z-value	p-value	95% CI	iExp(coef)
Intercept	-0.04	0.57	-0.08	0.94	-1.16 to 1.07	1.04
Light quantity	-4.09	1.50	-2.71	0.007	-7.03 to -1.13	59.48
Photoperiod	2.77	1.21	2.29	0.02	0.40 to 5.13	0.06
Mean temperature	1.54	0.55	2.78	0.005	0.46 to 2.63	0.21
Soil moisture	-0.17	0.55	-0.30	0.76	-1.25 to 0.92	1.18
Count model (≥1 bud)						Exp(coef)
Intercept	1.77	0.23	7.83	4.78e-15	1.33 to 2.21	5.86
Light quantity	-0.23	0.13	-1.76	0.08	-0.49 to 0.03	0.79
Photoperiod	-0.45	0.23	-1.94	0.052	-0.91 to 0.005	0.63
Mean temperature	-0.07	0.11	-0.71	0.48	-0.28 to 0.13	0.93
Soil moisture	-0.07	0.14	-0.50	0.62	-0.34 to 0.20	0.93
Log(theta)	0.52	0.22	2.32	0.02	-	-
Cleistogamous ZINB	Theta = 1.04, Log-likelihood = -291.3 on 11 DF
Binary model (0 vs. 1 bud)	Estimate	SE	z-value	p-value	95% CIs	iExp(coef)
Intercept	-0.08	0.56	-0.15	0.88	-1.19 to 1.02	1.09
Light quantity	4.21	1.84	2.30	0.02	0.61 to 7.81	0.01
Photoperiod	-2.54	1.47	-1.73	0.08	-5.42 to 0.34	12.63
Mean temperature	-2.10	1.30	-1.60	0.11	-4.61 to 0.47	7.92
Soil moisture	1.62	0.78	2.06	0.04	0.08 to 3.15	0.20
Count model (≥1 bud)						Exp(coef)
Intercept	2.98	0.29	10.25	<2e-16	2.41 to 3.55	19.69
Light quantity	1.00	0.54	1.87	0.06	-0.05 to 2.05	2.73
Photoperiod	-0.28	0.28	-1.02	0.31	-0.82 to 0.26	0.76
Mean temperature	-0.75	0.19	-3.88	1.03e-4	-1.13 to -0.37	0.47
Soil moisture	-0.11	0.13	-0.83	0.41	-0.36 to 0.15	0.90
Log(theta)	0.04	0.23	0.16	0.88	-	-

DF = degrees of freedom, SE = standard error, CI = confidence interval, iExp(coef) = inverted and exponentiated coefficients (inverted odds ratios), Exp(coef) = exponentiated count coefficients (incidence rate ratios).