Fig. 1From: Floral traits are associated with the quality but not quantity of heterospecific stigmatic pollen loadsFrequency distribution of the in- and out-degree values of each species in pollen transfer plant-plant networks. Different colours represent different locations: Eselsburger Tal (green), Hirschtal (orange), Reichenbach (purple). Different colour alpha values (i.e. shading) represent sampling date: early summer (0.4), mid-summer (0.7), late summer (1). The in-degree is the number of incoming links, i.e. number of species of which HP grains were found on the stigma. The out-degree is the number of outgoing links, i.e. the number of species to which HP grains were donatedBack to article page