"Physalis" is a genus of flowering plants, which grow in warm temperate and subtropical regions of the world. Most of the species are indigenous to the Americas. Cultivated species and weedy annuals have been introduced worldwide. A notable feature is the formation of a large, papery husk derived from the calyx, which partly or fully encloses the fruit. The fruit is small and yellow to orange, similar in size, shape, and structure to a small tomato (hence the name husk tomatoes).

Many "Physalis" species are called groundcherries. Other names used to refer to the fruit are husk cherries, poha berries, and golden berries.

A 52 million year old fossil fruit of "Physalis" has been found in Patagonia.

More Info: en.wikipedia.org