That’s the name of the particular cultivar! As Dave Barry would write, “I swear I am not making this up”: Alternanthera Ficoidea “Partytime.” Some possible common names: “Joseph’s coat,” “Parrot Leaf,” “Calico Plant” — http://davesgarden.com/guides/pf/go/89594/
Retired economics professor (“dismal scientist”). Married 40+ years to the love of my life; we have two grown daughters, both married, two granddaughters and a...