The cross on the bottom
In the middle, white facing you
The white faces you and the green is on the orange face: R' would bring the edge down to the wrong spot. D first brings the green spot under the right face, R' drops the edge into it, then D' puts the bottom back.
Bottom
Your status (“Learning” adds it to your reviews)
Algorithm
D R' D'
3 moves. The letters stand for the faces: review the notation.
Set up this case
From a solved cube, yellow on top and green in front, do this scramble: you get exactly this case.
D R D'
The cross on the bottom: other cases
Bring each white edge straight down to its spot, white on the bottom, no daisy.