This tomatillo plant was planted from seed this year and transplanted to my garden a few weeks ago. It resembles a tomato plant somewhat. Somewhat, but as you see here, the flowers are a bit different.
Family: Solanaceae (same as the tomato and potato); Genus & species: Physalis philadelphica
Odd that the species is named after Philadelphia. According to Wikipedia:
Tomatillos were domesticated in Mexico before the coming of Europeans, and played an important part in the culture of the Maya and the Aztecs, more important than the tomato
Maybe these would throw the predatory squirrels for a loop.