According to the USDA & the Lady Bird Johnson Wildflower Center, Gomphrena celosioides is a synonym for Gomphrena serrata. That's why I didn't mention it. I make no claims to know if they are correct or not.
Well, to add to the confusion...
The ITIS.gov website claims that Gomphrena celosioides is just a synonym for Gomphrena serrata.
http://www.itis.gov/servlet/Si...
http://www.itis.gov/servlet/Si...
However, the ITIS/Species2000 Catalogue of Life is showing them as separate species. Even ITIS is contradicting itself!
http://www.catalogueoflife.org...
http://www.catalogueoflife.org...