American black nightshade is native to the following states: AL, AZ, CA, FL, GA, HI, LA, MS, NM, NV, OR, TX, and WA.
Propagation is achieved through seeds and transplanting seedlings found in bird roosting areas.
The two native night shades in central florida with small white flowers, and purple fruit, are American black nightshade (Solanum americanum) and black nightshade (Solanum chenopodioides).
The key differences in the two plants is Solanum americanum has erect, shiny, fruit and Solanum chenopodioides has drooping, dull, fruit.
You can buy Florida ecotype seeds of both these native wildflowers at the links below.
Buy Florida ecotype American black nightshade (Solanum americanum) ✤ 50 Seeds
Buy Florida ecotype black nightshade (Solanum chenopodioides) ✤ 50 Seeds