Plant with Face inside it?!?

So at the beginning of going to Nekrotafeyo after coming down in the drop ship I in countered a weird plant. I saw a plant with a face inside it which you could only see if you got close to it or hopped on top of it?!? Before I could try to do anything it disappeared as if it phased or transported somewhere else. Has any one seen it or know what it’s about? Would really like to know?