From the recent time onwards Indian literatures have documented enough details on the common plants having some significant therapeutic applications for the mankind. Therefore in order to highlights these phytochemicals and to increase public attention over the world, two major Phyto species such as Eucalyptus and Marigold have been chosen. These Phyto species are available everywhere in the Indian location and highly utilized in various purpose such as Ayurveda, food and nutraceuticals. Though Eucalyptus and Marigold are very common yet people are unaware of their utility due to presence of some phytochemicals and Bioactive compounds. This book covers a comprehensive details about phytochemicals present in Eucalyptus and Marigold plants. The book highlights phytochemicals structures, properties and their applications.