Table 3.

Pollen grain analysis of the propolis from the PNP (NW Greece).

	PP1	PP2	PP3	PP4	PP5
Secondary pollen (16–45%)	Centaurea sp. Asteraceae 27% Liliaceae 25% Pyrus/Prunus Rosaceae 24%	Trifolium sp. Fabaceae 25% Pyrus/Prunus Rosaceae 25% Centaurea sp. Asteraceae, 16%	Liliaceae 26% Trifolium sp. Fabaceae 24% Boraginaceae 22%	Liliaceae 28% Trifolium sp. Fabaceae 25%	Asteraceae 28% Trifolium sp. Fabaceae 27%
Important minor pollen (3–15%)	Asteraceae, 8% Apiaceae 5%	Asteraceae 14% Apiaceae 11%	Centaurea sp. Asteraceae 15% Centaurea cyanus Asteraceae 8%	Pyrus/Prunus Rosaceae 13% Asteraceae 12% Rosaceae 9% Centaurea cyanus Asteraceae 7%	Pyrus/Prunus Rosaceae 14% Rosaceae 14% Liliaceae 12%
Minor pollen (<3%)	Brassica sp. Brassicaceae 2% Trifolium sp. Fabaceae, 2% Boraginaceae, 2% Vicia sp. Fabaceae, 2% Castanea sativa Fagaceae 1%	Castanea sativa Fagaceae 2% Liliaceae 2% Ononis sp. Fabaceae 2% Brassica sp. Brassicaceae 1%	Asteraceae 2% Apiaceae 1% Pyrus/Prunus Rosaceae 1%	Centaurea sp. Asteraceae 2% Boraginaceae 2%	Apiaceae 3%
Pollen from nectarless plants/Isolated pollen	Quercus sp. Fagaceae, Chenopodium sp. Chenopodiaceae, Scabiosa sp. Dipsacaceae, Pinus sp. Pinaceae, Poaceae, Euphorbia sp. Euphorbiaceae, Campanula sp. Campanulaceae, Oxalis sp. Oxalidaceae Cistaceae Caryophyllaceae Geranium sp. Geraniaceae, Polygonum aviculare Polygonaceae Populus sp. Salicaceae	Salix sp. Salicaceae Quercus sp. Fagaceae, Cistaceae Campanula sp. Campanulaceae, Vicia sp. Fabaceae, Pinus sp. Pinaceae, Chenopodium sp. Chenopodiaceae, Scabiosa sp. Dipsacaceae, Geranium sp. Geraniaceae, Lamiaceae, Caryophyllaceae Carex sp. Cyperaceae Cupressaceae Poaceae, Cistaceae Tribulus sp. Zygophyllaceae Ephedra sp. Ephedraceae,	Cupressaceae Ephedra sp. Ephedraceae, Smilax sp. Smilacaceae Salix sp. Salicaceae, Quercus sp. Fagaceae, Papaver rhoeas Papaveraceae Campanula sp. Campanulaceae, Vicia sp. Fabaceae, Caryophyllaceae Cistaceae Buxus semprervirens Buxaceae Plantaginaceae, Fraxinus sp. Oleaceae, Onobrychis sp. Fabaceae Populus sp. Salicaceae, Rosaceae Poaceae, Brassica sp. Brassicaceae Euphorbia sp. Euphorbiaceae	Quercus sp. Fagaceae, Cistaceae Campanula sp. Campanulaceae, Pinus sp. Pinaceae, Poaceae, Cupressaceae Brassica sp. Brassicaceae Chenopodium sp. Chenopodiaceae, Malva sp. Malvaceae Geranium sp. Geraniaceae, Lamiaceae Verbascum sp. Scrophulariaceae Loranthus europaeus Loranthaceae, Euphorbia sp. Euphorbiaceae	Quercus sp. Fagaceae, Pinus sp. Pinaceae, Populus sp. Salicaceae Cupressaceae Fraxinus sp. Oleaceae, Campanula sp. Campanulaceae, Euphorbia sp. Euphorbiaceae Poaceae, Papaver rhoeas Papaveraceae, Scrophulariaceae Acer sp. Aceraceae Artemisia sp. Asteraceae, Rhamnus sp. Rhamnaceae