Betonica officinalis L. in the Czech Republic. I. Variability of morphological characteristics
Variability of some morphological features (height and width of plants, length and width of basal leaves, length of inflorescences) were studied in situ and ex situ in Wood Betony (Betonica officinalis) originating from 10 natural sites of Czech Republic. The statistically significant differences in almost all studied characters were found between the plants from these localities in situ as well as ex situ in field cultivation in Olomouc.