A Perfectly Legitimate Earthly Plant

Before any of you go and yell at me questioning what this is of, please read this first. For all the people who know what it is of instantly, I thank you. I didn't do a metroid for the Brain Slug because it's just too obvious, and I thought this would be more fun.

Also excuse the awful texture, I'm still working on improving my skills. Oh, and for everyone's sake, don't try opening it in the Source Model Viewer or Hammer...