Fig. 2
Flower biology and mating system of Moehringia tommasinii. a Sexual functioning of flowers of Moehringia tommasinii. Pollen viability (dark grey bars) is given as the mean percentage (± SE) of stained pollen grains and stigma receptivity (light grey bars) as mean percentage (± SE) of receptive stigmas with germinating pollen grains, both as a function of flower age. Different letters indicate statistically significant differences in male (upper case) and female (lower case) function according to flower age (p < 0.05). Numbers in parentheses indicate the number of flowers manipulated. b Controlled hand-pollination experiments conducted in M. tommasinii to examine the mating system drawn across all six populations. Fruit set is given as the mean percentage (± SE) of flowers that set fruit after a given pollination treatment. Pollination treatments: As–spontaneous selfing, Ai–induced selfing, G–geitonogamy, Xe–xenogamy, Xebp–between population crosses. Different letters indicate statistically significant differences in male (upper case) and female (lower case) function according to flower age (p < 0.05). Numbers in parentheses indicate the number of flowers manipulated