Maybe there's a botanist teardropper in the crowd that can tell us the difference between a tumbleweed and a tree. Here's a tumbleweed Christmas tree in the Monahans SP visitor center. The lady pointed out the gazillion seeds that had fallen at the base, saying it's no wonder those things are everywhere out there.
hmm...wondering if they get green leaves in the summer...I've only been out there in winter, so honestly don't know.