In his early-seventeenth-century floral still lifes, Beert followed in the footsteps of Jan Brueghel I. No works of Beert are mentioned in the Rockox inventory, though paintings of representatives of the Brueghel dynasty are. Both Beert and the elder Jan Brueghel were masters in the creation of beautiful bouquets in which each flower is pictured at the most attractive moment of its existence and is a reflection of keen observation. Bouquets of this sort refer to the transience of existence on earth.