I havnt seen anyone, apart from NoChowder ask the right questions.

You got it last year correct? - It wont grow back.
It's dark green - IF anything, it'd be indica. [Short bushy plants]
Was there actually any bud? Or were you smoking leaves?
And was there any visable trichomes?
Main question - when you burnt it did it smell of weed, in the slightest?

From what you've said, you were either smoking a random plant, or you were smoking leaves.

For anyone here to give you any info at all, you need to get pics - but you say it was last year, so that's out of the question isnt it?

But you said something about it growing back in a few months? Do you know anything about growing cannabis? It wont grow back, if it does, it aint weed.