Longwoodgradms,

It looks like the Cassia x nealii (sometimes spelled, nealiea)....see the yellow-ish-versions by clicking the pictures found: here. Also, click here, and here, because your baby tree looks a lot like C. corymbosa, too.

Important Side Note: Those two could be the same thing as far as I would know. So many synonyms so little time, haha...(okay, that's not really funny). I'm neither an expert with Latin nor master of anything...just trying to compensate for you helping me. The link below is where I started the search beginning on Caesalpiniaceae, then Fabaceae and other ones....but can't remember which. Hoping that any of this helps. Merry Christmas! :o)

Here is a link that might be useful: Ethnobotany and Floristics of Belize

Thanks for the lead! I send an email to a specialist at NYBG, hopefully he will be happy to ID the photos rather than having to search each taxa online for a pic!