Morton was a prolific writer of books on various subjects from 1823 to 1851. He wrote Geological Observations in 1828, and both Synopsis of the Organic Remains of the Cretaceous Group of the United States and Illustrations of Pulmonary Consumption in 1834. His first medical essay, on the user of cornine in intermittent fever, in 1825 was published in the Philadelphia Journal of the Medical and Physical Sciences.[6] His bibliography includes Hybridity in Animals and Plants (1847), Additional Observation on Hybridity (1851), and An Illustrated System of Human Anatomy (1849).