It’s the picture we should get at this stage:



Find in Internet a picture of flower, like this one shown on the picture:



Cut it out, using the Eraser Tool (E) and insert it on our picture.



Select now Filter>Filter Gallery>Artistic>Cutout



Press on the next combination of buttons now: Ctrl+Shift+U (Desaturate).



Make a copy of our flower and place the copy above the original one. Next enter the option Filter> Filter Gallery>Stylize.



Press now on this combination of buttons: Ctrl+Shift+I.



Apply for this layer the next adjustments:



We’ll get the next result: