1) Dilleniid dicot genus 2) Genus santalum 
Santalum is a genus of woody flowering plants, the best known and commercially valuable of which is the Indian sandalwood tree, S. album. Members of the genus are trees or shrubs. Most are root parasites which photosynthesize their own food, but tap the roots of other species for water and inorganic nutrients. Several species, most notably S. albu...
• (n.) A genus of trees with entire opposite leaves and small apetalous flowers. There are less than a dozen species, occurring from India to Australia and the Pacific Islands. See Sandalwood.
San'ta·lum noun [ New Latin See Sandalwood .] (Botany) A genus of trees with entire opposite leaves and small apetalous flowers. There are less than a dozen species, occurring from India to Australia and the Pacific Islands. See Sandalwood . 
[n] - parasitic trees of Indonesia and Malaysia
genus Santalum noun parasitic trees of Indonesia and Malaysia