Charles T. Bryson, USDA Agricultural Research Service, Bugwood.org
Wetland nightshade
Solanum tampicense

Wetland nightshade (Solanum tampicense) is an invasive plant. It is a native of West Indies, Central America and Mexico and was first detected in Florida.

Wetland nightshade, being tolerant of full sun and full shade, can invade many types of wetland ecosystems such as cypress swamps and river edges. It is capable of forming extensive, dense stands that displace native vegetation.
Summaries of State Plant Protection Laws and Regulations
Florida   Oklahoma