I embiggened the picture and it looks as if the foliage is a sort of leaf-anorak they wear over their brown scaly bodies. What exactly happened to Arcimboldo-guy’s left arm is a mystery. His wife thinks she’s Beyonce.
I don’t know about all those leaves being clothing – their faces, hands, and forearms are all green and leafy.
Some of the leafy stuff does look to be clothes… which is actually kind of disturbing, since they look to be the same basic shape as their own leaves, and aren’t brown like they fell off on their own. Do the glowy-eyed forest idiots (who keep their leaves even in winter, despite being deciduous) strip the still-living branches off their defeated victims, transplanting them onto their own bodies for added warmth (!? [Goddammit, scifi, make sense for once]) and sugar production while training their growth with stitches?