German Chamomile (Matricaria recutita) and Roman Chamomile (Chamomaeelum nobile) are two different species of plants that have very similar healing properties. Roman chamomile is the plant best known and studied as a medicinal herb. It is often called “true chamomile or English or Russian chamomile.” Roman chamomile is a popular ground cover plant and German chamomile grows to be a height of 1 to 2 feet. Both plants are commonly used to treat, among other conditions, digestive disorders, anxiety, and insomnia.