Table 4.

Geographical origin of the Polish propolis examined.

Symbol	Region of Origin	The Most Abundant Plants in the Region	Bee Species
P1	Podlasie (Hajnowka)	spruce (Picea abies L.)—30%, pine (Pinus sylvestris L.)—27%, alder (Alnus glutinosa L.)—20%, sessile oak (Quercus petraea L.)—10%, silver birch (Betula pendula L.)—7%	Apis mellifera carnica x Apis mellifera caucasica
P2	Mazovia (Ciechanow)	pine (Pinus sylvestris L.)—70%, alder (Alnus glutinosa L.)—10%, sessile oak (Quercus petraea L.)—10%, silver birch (Betula pendula L.)—7%	Apis mellifera carnica
P3	West Pomerania (Miedzyzdroje)	pine (Pinus sylvestris L.)—75%, alder (Alnus glutinosa L.)—5%, beech (Fagus sylvatica L.)—5%, sessile oak (Quercus petraea L.)—5%, silver birch (Betula pendula L.)—4%	Apis mellifera mellifera