The tomatillo or husk tomato (Physalis ixocarpa) is a small, spherical and green or green-purple fruit surrounded by an enlarged calyx or husk. As the fruit matures, it fills the husk and can split it open by harvest. Tomatillos are the key ingredients in fresh and cooked green salsas and other Latin American dishes. The freshness and greenness of the husk is a quality criteria. Fruit should be firm, bright green as the green color and acidic flavor are the main culinary contributions of tomatillos.