Humulus is a genus of climbing plants commonly known as hops. These plants are primarily found in temperate regions and are known for their distinctive, cone-shaped flowers. Hops are essential in the brewing industry, as they add bitterness, flavor, and aroma to beer. The most well-known species is Humulus lupulus, which is cultivated for commercial use. Hops grow rapidly, often reaching heights of up to 20 feet in a single season. They thrive in well-drained soil and require plenty of sunlight, making them a popular choice for both professional and home brewers.