Is this Box Elder?

[Desert O'Piñon]

So I planted some cherry and lemon seeds in this flat a few weeks ago, just to see if they would grow without scarification. And the only thing to germinate thus far is this solitary seedling. And it's neither a cherry nor a lemon!
Uh, a little help?

 

[Desert O'Piñon]

Also, is it worth the time and effort to pursue this as an artwork? I'm still learning, and I don't know all the best species to use in the Chihuahua Desert yet.

 

[Gabler]

Pics or it didn't happen.

 

[Desert O'Piñon]

Pics or it didn't happen.

Ha! Yeah, that would definitely help! Wow, what a goof!

 

[Empty Mountain]

Koelreuteria paniculata

 

[Grunge_Bonsai]

Not sure, but definitely not box elder. I have 20 of those trying to volunteer in my garden if you would like one

 

[Desert O'Piñon]

Idk. I'm so new to this. I'm still figuring out what species thrive here, which survive here, and which one will be dead tomorrow in this dry air. Whatever it is, I didn't plant it intentionally. Lol
I'm going to let it grow and see what happens.

 

[Desert O'Piñon]

Koelreuteria paniculata

Yep. That definitely makes sense. I collected seeds from a friend's tree; they must have somehow found their way into my soil mix. Thanks for your help solving the mystery! Now I'll let it grow. Maybe, with a little fenagling, it could become a bonsai candidate.