Hmm, I think I have the same plant growing in my backyard, if not a differen't species of it. Heres some pics, WITH the flowers bloomed.
I've been trying to figure out what this is for awhile now.
It grows to about 1-1/2ft, all leaves have 7 blades.

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All the reason that I'm holdin' all the trees
And I gotta a lot a weed