Agree with Floral_uk, it looks like one of the black nightshades, probably S. douglasii given your location. There are several very similar species, and they grow wild pretty much everywhere. I take great pains to ensure that they never go to seed in my gardens, and they still crop up from dormant seed or from bird droppings. When I lived in San Diego, the local Hmong community cultivated one of the black nightshades extensively. There is a pretty god write up of the various species & their properties in the link below. Personally, I would just treat it like the weed that it is & dispose of it. Really nice jade plant bush behind it, by the way. Here is a link that might be useful: Black nightshade

Hyacinth bulbs. HTH Chris

Thanks for your replies and suggestions. I will take a sample and visit my local extension service office. That was really great advice. :) However, I wish those "3 tiny holes" were the extent of the damage This leaf is actually in very good shape. There are no aphids that I can see and I have not been able to find any other bugs on the plant. I will visit my local extension office where I can find some help and not criticism.. Perhaps I am wrong about these bugs causing the damage, but there is no doubt lots of damage to my tomato plant. I had holes inside some of my small fruit, even after this posting.. I opened one of the fruit and found nothing living inside.

It's a hardy begonia of some variety.......very likely Begonia grandis, as that seems to be the most common species.