Christmasberry, a native species, has been added to the USWildflowers database (12/30/2011.) Scientific name is Lycium carolinianum.  Photo below was taken at the De Soto National Monument in Manatee County, FL, on Dec 21, 2011. Go to the Christmasberry detail page for more photos and information.

Christmasberry, Carolina Wolfberry, Carolina Desert-thorn, Creeping Wolfberry – Lycium carolinianum