University of Maryland Medical Center - Presents an overview of the plant alongside its medicinal uses and indications. Includes precautions and supporting research. College of Agricultural Sciences - Features a complete description including the uses and history involved with this herb. NCSU Cooperative Extension - Covers basic information such as height, color, space and propagation. Image of the herb is also available. Sloan-Kettering - Calendula - Includes information on uses, constituents and mechanism of action. Loyola Medicine: Calendula - Covers indications, warnings and the side effects associated with this herb. Wikipedia: Calendula - Presents information including the herb's uses, diversity and chemistry. Gallery and references available. Herbwisdom.com - Calendula - Article covering the benefits and properties of this herb. Medline Plus: Calendula - Presents the safety concerns and how this herb works. References are included.