A harvesting header includes a header frame, a cutterbar assembly mounted to the header frame, and a conveyor assembly supported behind the cutterbar assembly to receive crop severed by the cutterbar assembly. The conveyor assembly includes a pair of side conveyors and a fore-and-aft draper located between the side conveyors. The header further includes a central crop-conveying member that overhangs the rear margin of the fore-and-aft draper and a floor pan that at least partly defines a transition area. The floor pan presents a forwardmost edge adjacent to and rearward of the rear margin. The forwardmost edge is located above a lower run of the draper to direct severed crop materials from the upper run of the draper and to facilitate crop material flow through the transition area.
