Mary, I love your description of the one you had. I can see it in my mind!
And I also love the poem, mostly exaggerated as if in the mind of a child, but I'll bet it's entirely possible for some of those plants to decide to grow and turn white and yellow for lack of light then die and slime when they give up. And the roots did rot and stink, just as he says.
Yes, a great poem!! Thank you for finding it and sharing it with us! I'll go around all day smelling Roots, ripe as old bait and thinking of dirt breathing a small breath!