You have an awesome style. Love the 'rough' and 'painterly' look to it. I wish I could draw and paint like you, then the images I see in my head would at least look like they look to me if I drew them!
This is fantastic! Great job on the trunks, very vein-like! I get a 'journey to the center of the earth' feel from this. I especially like how everything is very neutral but you've added the 'glow' of red to add to the wonder. Really great concept.