*3.1. Botanical Preference for Bee Pollen Production*

The results of palynological analysis of the studied bee pollen samples are summarized in Figure 2 and Table 1. In the set of samples analyzed were identified fifty-one pollen types belonging to 32 families.

**Figure 2.** Frequency of the pollen types identified in the bee pollen samples.

Considering the distribution of the different pollen types in samples, pollen grains from *Rubus*, *Castanea*, *Genista* type and *Erica* were present in more than 50% of the samples (Figure 2). Other frequent pollen types were from *Taraxacum officinale* type, *Echium* and *Trifolium repens* type (found in 30% of the samples). With regards the abundance of pollen types in each sample, some of the well-distributed pollen types such as *Rubus*, *Castanea*, *Genista* type, *Taraxacum officinale* type and *Lythrum* were found, at least in one sample, as dominant pollen (>45%) (Table 1). However, *Rubus* and *Castanea* were the most representative pollen types (26 and 20 samples, respectively), and those with the highest percentage counted in the pollen spectrum, with mean values above 22% and maximum value of more than 90% (Table 1).
