Statistical analysis
The obtained data were processed by the methods of statistic variation
(Sokal and Rohlf 2012). An analysis of the variability of morphological
parameters was performed using descriptive statistics (minimum and
maximum of the indicator), and range diagrams (mean value ± error of the
mean and standard deviation). A comparison of arithmetic means was
carried out using Student’s t-test.
The ordination of perfect and pistillate flowers according to the
studied parameters was carried out using the principal component method
by the Statistica 10.0 software package. Before determining the main
components, the morphological features were normalized by adjusting
their values to the arithmetic mean.