Lobelia is a genus of flowering plants that belongs to the family Campanulaceae. They are commonly known as "lobelias" and are prized for their vibrant blue, purple, or red flowers. Lobelia plants are native to the Americas, Africa, and Asia, and are now grown in many other parts of the world as ornamental plants.

Lobelia plants have upright or trailing stems that can reach up to three feet in height. The flowers are typically tubular in shape and arranged in spikes or clusters. The foliage of Lobelia plants is often green and can be quite ornamental, with lance-shaped leaves.