Physalis peruviana is closely related to the tomatillo and to the Chinese lantern, also members of the genus Physalis.[2] As a member of the plant family Solanaceae, it is more distantly related to a large number of edible plants, including tomato, eggplant, potato and other members of the nightshades.[2] Despite its name, it is not closely related to any of the cherry, Ribes gooseberry, Indian gooseberry, or Chinese gooseberry.

The fruit is a smooth berry, resembling a miniature, spherical, yellow tomato. Removed from its bladder-like calyx, it is about the size of a marble, about 1–2 cm in diameter. Like a tomato, it contains numerous small seeds. It is bright yellow to orange in color, and it is sweet when ripe, with a characteristic, mildly tart flavor, making it ideal for snacks, pies, or jams.[2] It is relished in salads and fruit salads, sometimes combined with avocado. Also, because of the fruit’s decorative appearance, it is popular in restaurants as an exotic garnish for desserts.

A prominent feature is the inflated, papery calyx enclosing each berry. The calyx is accrescent until the fruit is fully grown; at first it is of normal size, but after the petals fall it continues to grow until it forms a protective cover around the growing fruit. If the fruit is left inside the intact calyx husks, its shelf life at room temperature is about 30–45 days.
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https://en.wikipedia.org/wiki/Physalis_peruviana