Although I very much abhor guessing games, I'll see if I can settle this issue (of identifying the "rogue vegemitation") quickly, and if coincidence-willing, correctly.
Would the above stumpy growth (is it large, small, weird-looking?) happen to be in the very same class as this thing here?
I forget what these things are called again? Haven't eaten one in so long - a rutabaguh(~sp)?