Starting from the bottom of the slope in the foreground, heather and bracken dominate the dry, heathy area (dark - light green).
Juncus (pinky/brown) predominates in the very wet, boggy flush.
Bracken then returns as likes the deeper soils and steeper slopes with good drainage. It is an invasory species, which colonises this former pastoral land.
Heather ( dark brown) prefers the gentler slopes. The heather at the slope summit has been burnt. This area shows up as the pink lobe on the middle left of the aerial image you saw previously. The transect of this photo runs from north to south on the image.