Mushroom song

The Internet is a wondrous thing sometimes. A fragment of a ditty about mushrooms stuck in my mind and surfaced today: I'd read it in a book about campers back in '66 or so. Searching about, there seem to be several variants, and one version claimed James Thurber as the author (?I didn't find evidence). I went to camp but once in my youth, and that camp was more about singing hymns than folk songs--not that I cared much for either--so I've no historical bias. Which, if any, of these 4 did you learn?

(The third seems slightly corrupted, but maybe the music was different.) archive.org is back.

The mushroom is a vegetable
To select it few are able
You won't know them when you meet them
You won't know them 'til you eat them
If in heaven you awaken
You will know you were mistaken
And the ones that you have eaten
Weren't the ones you should have et.

Mushrooms are a vegetable
which you eat when you are able
you will know one when you see one
you will know one when you eat one
if in Heaven you awaken
then you’ll know you were mistaken
Must have been a toadstool, tough luck!!!

Mushrooms are a veg-e-table
That you eat when you are able,
You will know when you eat them,
You will know them when you eat them.
If in heaven you awaken
And you find you were mistaken,
That the mushrooms you had eaten
Weren’t the ones you should have et.
Must have been toadstools -- tough luck!

“Mushrooms is a veg-e-table; 
to detect them few are able. 
If in Heaven you awaken 
then you’ll know you were mistaken, 
And the ones that you have eaten 
weren’t the ones you should have eat!”