Ilex, commonly known as holly, is a genus of plants in the family Aquifoliaceae. It includes about 400 species, which are primarily evergreen shrubs and trees. Ilex is recognized for its glossy, spiny leaves and bright red berries, often associated with winter celebrations, particularly Christmas. These plants are found in various habitats, from tropical regions to temperate zones. Ilex species are important for wildlife, providing food and shelter for birds and other animals. Some species, like Ilex aquifolium, are cultivated for ornamental purposes and are valued for their aesthetic appeal in gardens and landscapes.