I have 3-4 foot plant (looks like a pepper plant) that I don't recall planting in my garden and don't know what it is. It has very small white flowers and numerous groupings of 7 to 10 , what looks like, green berries (but they are not) turning to deep purple but not getting much bigger. They have seeds in the middle. They are each about 1/3 inches in diameter.
Vegetable-What Is It
Look up nightshade under google images. I believe the berries will turn red. Mildly toxic and possibly hallucigenic. Birds eat the berries and spread as they fly. Let us know! One such photo. http://images.google.com/search?tbm=isch&hl=en&source=hp&biw=792&bih=454&q=nightshade&gbv=2&oq=nights&aq=0&aqi=g5g-s1g4&aql=&gs_sm=c&gs_upl=8297l10078l0l14890l6l6l0l0l0l0l515l1421l4-2.1l3l0