Fennel, is a flavorful culinary herb and medicinal plant. Fennel plants are green and white, with feathery leaves and yellow flowers. Both the crunchy bulb and the seeds of the fennel plant have a mild, licorice-like flavor. Yet, the flavor of the seeds is more potent due to their powerful essential oils. Aside from its many culinary uses, fennel and its seeds offer a wide array of health benefits.